At last! The Biketronics BT4180 amp review you've all been waiting for! - Page 12 - Car Audio | DiyMobileAudio.com | Car Stereo Forum

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Old 10-11-2018   #276
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by bbfoto View Post
NICE!

I think I need one or two of these in my life! What was the turnaround time for this?
About 2 weeks. But most of that was my doing. Instead of the yellow color that is standard by the connector plate, I requested a plain black plate. Slight delay in when he was sending out new plates out to be anodized to fulfill this request.

For couple days, I was out of town and not unable to provide the exact RCA measurements I wanted fulfilled which caused a delay. The RCAís are physically in the same place but the area around them has been milled out to a larger opening.

*The standard stock RCA opening can accept most RCAís out there. I was just being uber picky and wanted to utilize some Audio Esoteric E7 home audio RCAís with bulky cosmetic RCA heads. All other RCAís I tried fit fine (Stinger, Streetwires, blue jeans cable).

I also have a BT4180. The actual rca connectors are a tad bit closer to each other in the BT4180 model. Even if the area around them is milled out, there is just barely not enough clearance side-to-side after I line up the center post on adjacent positions for my bulky RCA heads. I attached pics of my unmodified BT4180.

I wasnít about to burden Mike with redesigning his circuit/product on the account of my RCA desires. This will be easily remedied by a female to male rca adapter, or just simply use another RCA cable.

Then for the graphic I put together, Mike reached out to Hypex for permission to use the wave graphic which was another slight delay.

Quote:
Originally Posted by Architect7 View Post
That is awesome! And funny since it will do more like 1200-1600wrms at 2ohms, very underrated. Canít wait to hear how you like it.
No doubts about it. The linear power and clarity my BT4180 provided was already unreal to grasp. My build is a slow progress project and still have some work to do in my sedan trunk for a stealth false floor setup but I hope to have this amp singing before Thanksgiving.
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Old 10-11-2018   #277
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Thanks for the detailed info and pics!

And yeah, I love those EA E7 RCA's as well.

For the system I'm currently working on, I would probably need one of the BT4250 and one or two of the BT4180 as well.

I guess these are made to be placed inside a fairing or in enclosed saddlebags on a HD, but do you think they'd have any problems heatwise buried under a rear quarter trim panel or in the sealed front boot of a Porsche 911?

Would love to have these included in the next high-end "SQ Amplifier Shootout".
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Old 10-11-2018   #278
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by bbfoto View Post
Thanks for the detailed info and pics!

And yeah, I love those EA E7 RCA's as well.

For the system I'm currently working on, I would probably need one of the BT4250 and one or two of the BT4180 as well.

I guess these are made to be placed inside a fairing or in enclosed saddlebags on a HD, but do you think they'd have any problems heatwise buried under the rear quarter trim panel or in the sealed front boot of a 911 Porsche?

Would love to have these included in the next high-end "SQ Amplifier Shootout".
These things are of solid build quality. Once you hold it in your hand and feel its mini heft youíll understand. As you mentioned these amps are were physically designed to fit in bike fairings or saddle bags where they would experience long periods of exposure to heat/sun. I think they should do fine given their 90% efficiency. Plus they have active cooling via 2 internal fans.

I too would like to see these in an amplifier shootout. Anybody in touch with Matt Hall?

These arenít using GaN Fet tech like the SounDigital amps but these amps are near the pinnacle of Class D topology in regards to PWM and feedback filter design. Up there with the MMATS HIFi series that are based off the Infineon IRAUDAMP4 Class D design.

Very few amplifiers disclose the details about their Class D circuits. Biketronics uses Hypex UcD and I like that Hypex is more transparent about their empirical approach towards providing audiophile grade sound via the class D topology. *haha might need an electrical engineering degree/education to decipher it all but itís out there at least.
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Old 10-11-2018   #279
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Again, THANKS for the info and quick response.

Yeah, I'm curious to see the performance when more GaN Fet based amps come out.

From what I know about the Hypex UcD modules, I've heard that quite a few big manufacturers of both high-end and mid-level active/powered studio monitors are using them.

And I just realized that Mike has created and is working on a BT6180, so that along with one of the new BT4250 amps would be perfect for my setup.

I believe that you can reach Matt Hall via the web site or respective Facebook page Link at...

Revelation Audio
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Old 10-11-2018   #280
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

IDK about a 911, but I'm in the process of putting 2 BT4180s and one BT2250 in a C7 corvette along with a MS-8. It is tight but it'll all fit. The Biketronics amps are very compact.
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Old 10-11-2018   #281
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by Bizarroterl View Post
IDK about a 911, but I'm in the process of putting 2 BT4180s and one BT2250 in a C7 corvette along with a MS-8. It is tight but it'll all fit. The Biketronics amps are very compact.
I would LOVE to see details/pics of this build!
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Old 10-11-2018   #282
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

I'll try to put something together. I plan on doing some of the work this weekend.
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Old 10-12-2018   #283
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Regarding a new SQ amp shootout, I doubt that Matt Hall will be doing any more. I thought I saw him post somewhere that while he may do some additional equipment shootouts, that because of his association with Revelation he wouldn't be publishing any more amp shootouts. I could be wrong, and it certainly doesn't hurt to ask him.


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Old 10-12-2018   #284
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by rton20s View Post
Regarding a new SQ amp shootout, I doubt that Matt Hall will be doing any more. I thought I saw him post somewhere that while he may do some additional equipment shootouts, that because of his association with Revelation he wouldn't be publishing any more amp shootouts. I could be wrong, and it certainly doesn't hurt to ask him.
Nooooooooooooooooooo!

Womps thatís a bummer
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Old 10-12-2018   #285
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by Bnlcmbcar View Post
Nooooooooooooooooooo!

Womps thatís a bummer
Not a problem.

If anyone wants to send me their ultra-rare, esoteric amplifiers, I will gladly hook them up to a cheap computer power supply, feed them low-quality music streams over a Radio Shack 3.5mm to RCA adapter and drive a couple PE Buyout mids sitting loose on a counter top. A full tiered ranking report scribbled on the back of of a political campaign flyer will be photographed with a potato and uploaded for all to review.

If anyone is interested, just shoot me a PM.


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Old 11-08-2018   #286
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Ordered a couple more!

Hereís a pic of the 4x180 guts vs the 4x250 guts
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Old 11-08-2018   #287
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

For what it's worth, for the last 3 years I have had two of the BT4180s running my front sound stage, and have had no issues whatsoever.

They sound great, and the tiny size was perfect for my stealth install.

One of the units I purchased used from a forum member, and one was new from the company.

Highly recommended!
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Old 11-17-2018   #288
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Attachment 233851
Quote:
Originally Posted by bbfoto View Post
I guess these are made to be placed inside a fairing or in enclosed saddlebags on a HD, but do you think they'd have any problems heatwise buried under a rear quarter trim panel or in the sealed front boot of a Porsche 911?
Confirmed from Mike himself that the amps are very stable thermal wise due to the extremely high efficiency of the Hypex modules, itís overbuilt power supply, and the two internal cooling fans.

They are stable to be stacked in the following configurations (pics attached).

SDS Velcro would be plenty strong to hold them together and even provide a tiny spacing.
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Old 06-23-2019   #289
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

How are you mounting them? Got a4 channel to spare?
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Old 06-23-2019   #290
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Quote:
Originally Posted by dcfis View Post
How are you mounting them? Got a4 channel to spare?
Iíll be doing a write up/build log soon with all the details.

No spares at the moment. I opted to stack 3 amps together for a mini 12 channel beast! 2 BT4180ís and 1 BT4250. This powers 3-way front stage, 2-way rear fill, and a center channel.

Iím stashing everything in Civic spare tire/donut well. Donít judge the rats nest of cables.. itís an ever evolving personal daily driver project with a lot going on: Helix DSP Pro 2, miniDSP DDRC 22, miniDSP DDRC24, 2 x iFi itube2 preamps, and a passive crossover for a 2-way center so far

I also added Noctua external fans purely for peace of mind during the summer heat. Personal preference. Not really needed per Mike.

Stacked and mounted them using 3M SJ3551 400 Dual Lock strips. Which is more than enough in my scenario. My trunk is lined with MLV. The 3M product adheres like a champ. Similar to Resonix MLV compatible Velcro or SDS Velcro but the 3m Dual Lock is a firmer product which provides a desired gap for air flow between the bottoms of the stacked amps.

Specifically the 400 variant of the 3m Dual Lock provides the highest density of attachment points. A 400 to 400 attachment is a eerily strong attachment. I made the mistake of attaching 1 large 3Ēx2Ē piece to the Helix DSP Pro 2 on the middle of the unscrew-able bottom plate... I literally bent/warped the bottom plate before the 400/400 connection even budged when attempting to remove the DSP mounted to MLV. Smaller cut 1/2Ē to 1Ē square pieces in the corners of everything is a better solution so far.

https://www.ebay.com/itm/Free-Shippi...7-b23c38704ee4

But all this works phenomenal like I said for my scenario when adhering to MLV. It will also super grip to cleaned metal. I havenít really tested its adhesion to wood. But 3m makes other Dual Lock products with different adhesions so there is still probably a solution. Iím constantly swapping parts havenít had any securement issues with various equipment using this method of attachment in a daily driver for the past 3 years. Everything stays put through the potholes, speed bumps, abrupt brakes, etc.

I canít find the pics but I think Biketronics can put screw mounts that protrude from each corner if you would prefer a mechanical attachment.
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Old 06-23-2019   #291
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Awesome, Though kinda sucks in my install I need it to screw in. Could work something out though. If you know or hear anyone selling for good price please let me know. Also any chance you talked to him about us car guys? I doubt he would care until the winter with all the bike stuff. I saw some harley forum guys stating they do a $150 off Christmas sale?
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Old 06-23-2019   #292
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Also have you ever heard him say that a 2*180 and 2*250 module amp could be done? That would be sick
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Old 06-23-2019   #293
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by Bnlcmbcar View Post
Iíll be doing a write up/build log soon with all the details.

No spares at the moment. I opted to stack 3 amps together for a mini 12 channel beast! 2 BT4180ís and 1 BT4250. This powers 3-way front stage, 2-way rear fill, and a center channel.

Iím stashing everything in Civic spare tire/donut well. Donít judge the rats nest of cables.. itís an ever evolving personal daily driver project with a lot going on: Helix DSP Pro 2, miniDSP DDRC 22, miniDSP DDRC24, 2 x iFi itube2 preamps, and a passive crossover for a 2-way center so far

I also added Noctua external fans purely for peace of mind during the summer heat. Personal preference. Not really needed per Mike.

Stacked and mounted them using 3M SJ3551 400 Dual Lock strips. Which is more than enough in my scenario. My trunk is lined with MLV. The 3M product adheres like a champ. Similar to Resonix MLV compatible Velcro or SDS Velcro but the 3m Dual Lock is a firmer product which provides a desired gap for air flow between the bottoms of the stacked amps.

Specifically the 400 variant of the 3m Dual Lock provides the highest density of attachment points. A 400 to 400 attachment is a eerily strong attachment. I made the mistake of attaching 1 large 3Ēx2Ē piece to the Helix DSP Pro 2 on the middle of the unscrew-able bottom plate... I literally bent/warped the bottom plate before the 400/400 connection even budged when attempting to remove the DSP mounted to MLV. Smaller cut 1/2Ē to 1Ē square pieces in the corners of everything is a better solution so far.

https://www.ebay.com/itm/Free-Shippi...7-b23c38704ee4

But all this works phenomenal like I said for my scenario when adhering to MLV. It will also super grip to cleaned metal. I havenít really tested its adhesion to wood. But 3m makes other Dual Lock products with different adhesions so there is still probably a solution. Iím constantly swapping parts havenít had any securement issues with various equipment using this method of attachment in a daily driver for the past 3 years. Everything stays put through the potholes, speed bumps, abrupt brakes, etc.

I canít find the pics but I think Biketronics can put screw mounts that protrude from each corner if you would prefer a mechanical attachment.
I can't even comprehend what's going on in your picture

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Old 06-23-2019   #294
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Quote:
Originally Posted by dcfis View Post
Also have you ever heard him say that a 2*180 and 2*250 module amp could be done? That would be sick
Iíve wondered about that as well. Something along the lines of swapping 2 of the 250 modules from a BT4250 for 2 of the 180 modules. The BT4250 power supply would be more than capable. This could bring the BT4250 price down by a little as well as provide the often desired staggered power setup for front stages.

May take a minute to get an answer but Iíll see what I can get out of him!

Quote:
Originally Posted by SlvrDragon50 View Post
I can't even comprehend what's going on in your picture
Yea itís a lot. But there is a method to the madness. Give me a couple weeks more to work on it.. and Iíll tell the story of the source signalís wonderful journey to amplification!
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Old 06-24-2019   #295
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Quote:
Originally Posted by dcfis View Post
Awesome, Though kinda sucks in my install I need it to screw in. Could work something out though.
Iím still searching for where I saw it but there is a pic floating somewhere. The Biketronics amps all have a screw in each corner on the bottom plate where attachment feet can be attached.

They can do it for you if you buy directly from Biketronics or you could fashion one from using 4 small/short black mending plates for each corner with a slightly longer screw to accommodate the plate thickness.
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Old 06-24-2019   #296
 
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

Those would work well
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I picked one up on the Harley forum for a decent price, couldn't help it. Wondering if the puny power wires will be ok less than 6 inches to the block. Forgot about the mount feet problem. Will have to figure something there.

Spoke to Mike and he is about ready to have the car specific biketronics ready for sale
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Default Re: At last! The Biketronics BT4180 amp review you've all been waiting for!

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Originally Posted by dcfis View Post
I picked one up on the Harley forum for a decent price, couldn't help it. Wondering if the puny power wires will be ok less than 6 inches to the block. Forgot about the mount feet problem. Will have to figure something there.

Spoke to Mike and he is about ready to have the car specific biketronics ready for sale
Hmmmmmm, thanks for sharing that... Will they have the same power wires?

2018 Jeep GC - AF GB10s, GB25s, GS690s, Zapco & Mosconi amps, (2) AF GB12s, Helix Pro MK2 & Director, Fiio X5
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No, they will use xt 60 or 90 quick connects with bigger gauge wire for more car audio specific wiring. Check post #253 on this thread for pics

Last edited by dcfis; 1 Week Ago at 02:25 PM..
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Quote:
Originally Posted by dcfis View Post
I picked one up on the Harley forum for a decent price, couldn't help it. Wondering if the puny power wires will be ok less than 6 inches to the block. Forgot about the mount feet problem. Will have to figure something there.
The puny wires should hold up for 6 inches. I was initially running them 20 inches until the block with no issues.

Also heads up for when you do try it out.. if you have a faint noise floor, this can be remedied by sending it to mike to have the input voltage (gain) changed. They can increase the input voltage closer to ~4 volts instead of the 2-3 volts they tend to be set at by default.

I competed with these amps in my 1st competition event at MECA west-coast semi finals this year. With no EQ adjustments, just speaker placement, TA/phase adjustments, and DSP channel gains adjustments, I was able to snag 2nd place for modified class.

Luck or not it’s a testament that these amps won’t degrade your sound quality as a class D option.
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