[JonnyF]

The extention cables I bought allows them to bend 90 degrees, I cut a hard foam piece that supports them in place when the cover is closed, it doesn't touch any transistors so heat isn't a problem.

I don't have them mounted in a car, I use them in a custom system for my patio area.

 

[Dremgragen]

View attachment 314557

I am posting my experience in the hope it helps others like me,

I have been an audio enthusiast for many years. I have always loved experimenting and building custom audio systems for car and home.

My latest hobby brought me to design and build a sq system for my patio area. It consists of 6 custom speakers for highs and 4x 12inch alpine type x subs..
2x alpine 3544 running the highs and 4x x-a90m on the subs
Audiocontrol eq
Souce is a custom ddac built by me.
200 amp AC to DC powersupply

I have always loved the sound of alpine 3544 and also had two 3558 for driving my tops until they died.

After looking for an upgrade I saw the zapco ap but I could not find many reviews.

I impulsivly bought 2 x 150.2 AP to replace my 3544 after they replaced my 3558 which have died due to age.

I swapped the Amps and was very disappointed to say the least. The natural sound and spacious staging was gone.

It sounded totally inferior and unfortunately a huge disappointment.

Then i started looking for information about replacing the opamps. Still finding no one who had done the change and update on their finding.

I immediately ordered the equipment and today I was able to complete the installation.

Immediately after connecting I was pleasanty surprise about the difference the opamps make. It now sound much better, more open, the great Soundstage is back. Different but it's there.

I did a few tests with my second 150.2 before replacing the op Amps there too.

I can gladly say that it is worth the effort.

One small note, I find that after the upgrade gains need to be raised a bit to get the same output volume after the change.

Hope this helps others

You got me wanting to try this. The Z-150.6 AP is the best amp I've ever heard, so the idea that it could be even better makes my eyes sparkle. Pretty easy upgrade to do without worry of ruining your amp?

Sent from my SM-G975U1 using Tapatalk

 

[JonnyF]

The internal of the 150.6 are not as spacious as the 150.2, I suggest checking if there is enough place for the v6.

Not all need to be replaced depending on how you use your amp I wouldnt replace them on a sub channel only for the mid and high. Also take into consideration the components which get very hot on the external rails, don't think it's healthy for the opamp.

Besides that I listen to my system every day and enjoy every minute

 

[trunks9_us]

You got me wanting to try this. The Z-150.6 AP is the best amp I've ever heard, so the idea that it could be even better makes my eyes sparkle. Pretty easy upgrade to do without worry of ruining your amp?

Sent from my SM-G975U1 using Tapatalk

I’m about to sell both my 150.6 ap amps but as he said I have also been told by zapco they won’t fit in this model not the reason I am selling them I love the zapco ap but I am moving to tru technology class a amp is all. I’ll be doing my comparison in a two weeks probably.

 

[JonnyF]

I’m about to sell both my 150.6 ap amps but as he said I have also been told by zapco they won’t fit in this model not the reason I am selling them I love the zapco ap but I am moving to tru technology class a amp is all. I’ll be doing my comparison in a two weeks probably.

So after reading your post I discovered Tru Technology. Found 2 new IA online and bought them

This time I can say don't upgrade the Zapco just sell it and buy a Tru Technology amp they are way better then my upgrade

 

[trunks9_us]

View attachment 321444 View attachment 321445

So after reading your post I discovered Tru Technology. Found 2 new IA online and bought them

This time I can say don't upgrade the Zapco just sell it and buy a Tru Technology amp they are way better then my upgrade

I asked about the ia they aren’t class a amps idk if you knew that or not.

 

[JonnyF]

I understand the preamp is a class a circuit. Doesn't really matter don't believe there are class a that can output high wattage, there are all a/b, In the end sounds great.

I bought what I found on ebay

 

[trunks9_us]

I understand the preamp is a class a circuit. Doesn't really matter don't believe there are class a that can output high wattage, there are all a/b, In the end sounds great.

I bought what I found on ebay

I asked if it is a class a I don’t think your understand I called tru tech and asked. It’s not a class a preamp circuit.

That actually isn’t true on the all amps being class ab that’s why yours cost 1k maybe 2k at the most and the class a cost about 8k. The amp you have is a great amp Don’t get me wrong it’s just not the same amp
As a Class a is all I am stating.

 

[JonnyF]

I saw their class a range. To be honest anyone spending that much on an amp is overkill that I don't believe is warrented.

Bought both of mine for $1900 so to me it was value for money. A better investment then the zapco and opamps.

Perfection doesn't exist there is always better. Personally I'm happy and that's worth every cent I've spent

 

[changster]

Does anyone know if the Z-1100.1 AP (or any AP for that matter, since their engineering should be all the same) is stable down to 1ohm, assuming proper ventilation?

 

[Huckleberry Sound]

Does anyone know if the Z-1100.1 AP (or any AP for that matter, since their engineering should be all the same) is stable down to 1ohm, assuming proper ventilation?

Specifications via Zapco website

• Power @ 4Ω: 1000 watts
• Power @ 2Ω: 2000 watts
• THD @ Rated Power < 0.05%
• Signal to Noise Ratio > 110dB
• Frequency Response 10Hz to 30,000Hz ±1dB
• Input Sensitivity 1v to 9v
• Dimensions in mm: 190(W) x 62(H) x 482(L) Overall: 190(W) x 62(H) x 518(L)

 

[changster]

Specifications via Zapco website

• Power @ 4Ω: 1000 watts
• Power @ 2Ω: 2000 watts
• THD @ Rated Power < 0.05%
• Signal to Noise Ratio > 110dB
• Frequency Response 10Hz to 30,000Hz ±1dB
• Input Sensitivity 1v to 9v
• Dimensions in mm: 190(W) x 62(H) x 482(L) Overall: 190(W) x 62(H) x 518(L)

Yes I understand this. It's not on their spec sheet. What I'm after more is whether I can still wire my subs (3 DVC 2's) into that range while making sure I pay attention to heat dissipation and ventilation. It won't be within Zapco's spec sheet parameters, this I know. I don't care about losing warranty. I also understand it may not produce any more power than 2000 watts. I just want it to be stable and not shut down.

And to be honest, when I turn it up it will only be for 1-2 tracks at a time. The super silly "turn it up" mode is only for 5-10 minutes at a time. Normal listening range is like 85-95db. Silly mode is like 120db once in awhile.

The setup is 3 DVC 2ohm 12" Adire Brahma Rev 2.5's wired in series/parallel for a 1.33ohm load. The amp is a Zapco Z-1100.1 AP monoblock.

 

[LR Drvr]

Yes I understand this. It's not on their spec sheet. What I'm after more is whether I can still wire my subs (3 DVC 2's) into that range while making sure I pay attention to heat dissipation and ventilation. It won't be within Zapco's spec sheet parameters, this I know. I don't care about losing warranty. I also understand it may not produce any more power than 2000 watts. I just want it to be stable and not shut down.

And to be honest, when I turn it up it will only be for 1-2 tracks at a time. The super silly "turn it up" mode is only for 5-10 minutes at a time. Normal listening range is like 85-95db. Silly mode is like 120db once in awhile.

The setup is 3 DVC 2ohm 12" Adire Brahma Rev 2.5's wired in series/parallel for a 1.33ohm load. The amp is a Zapco Z-1100.1 AP monoblock.

Hook those subs up to that thing and run it hard until it fries all those little Chinese components and circuitry. And none of those specs are accurate anyway. Take that AP to get tested and you will notice it does not make rated power in 4 or 2 ohms and the signal to noise ration of 110db is a joke. More like 90db. Also the bias cannot be adjusted to eliminate crossover distortion. The damping factor is 14 to 15, which is low. And be careful with the terminal screws. The internal threads are made with such cheap metal they strip easily. How do I know? I just sent a brand new one that was only bench powered a couple times to an engineer and technician for terminal replacement and full test. The older Korean made models were better built, like the ZX series and possibly the LX series. For some reason the prices of the AP series have significantly increase. It sure is not due the poor quality control and production getting any better.

 

[Niebur3]

Hook those subs up to that thing and run it hard until it fries all those little Chinese components and circuitry. And none of those specs are accurate anyway. Take that AP to get tested and you will notice it does not make rated power in 4 or 2 ohms and the signal to noise ration of 110db is a joke. More like 90db. Also the bias cannot be adjusted to eliminate crossover distortion. The damping factor is 14 to 15, which is low. And be careful with the terminal screws. The internal threads are made with such cheap metal they strip easily. How do I know? I just sent a brand new one that was only bench powered a couple times to an engineer and technician for terminal replacement and full test. The older Korean made models were better built, like the ZX series and possibly the LX series. For some reason the prices of the AP series have significantly increase. It sure is not due the poor quality control and production getting any better.

Who are you and why do you keep bringing up old threads to bash Zapco? Hiding your profile......TROLL!!!!!! @JimmyDee @MythosDreamLab

 

[lv_v]

Yes I understand this. It's not on their spec sheet. What I'm after more is whether I can still wire my subs (3 DVC 2's) into that range while making sure I pay attention to heat dissipation and ventilation. It won't be within Zapco's spec sheet parameters, this I know. I don't care about losing warranty. I also understand it may not produce any more power than 2000 watts. I just want it to be stable and not shut down.

And to be honest, when I turn it up it will only be for 1-2 tracks at a time. The super silly "turn it up" mode is only for 5-10 minutes at a time. Normal listening range is like 85-95db. Silly mode is like 120db once in awhile.

The setup is 3 DVC 2ohm 12" Adire Brahma Rev 2.5's wired in series/parallel for a 1.33ohm load. The amp is a Zapco Z-1100.1 AP monoblock.

Did you ever try this out or get any feedback? I’m looking to do the exact same thing as you with this same amp (3 x 2ohm DVC subs wired to 1.33ohms).

 

[MCLSOUND]

Yes they are stable musically to 1ohm
I however would not hook up 4 x 12"/4ohm subs to a bridged pair of channels on a AP.
You can take a 150.6 AP and run a 2way plus sub..like a JL W7 which is 3ohms..
I have a client doing this exact setup with zero issues.
He purchased a Z150.6ap from us for this exact reason..

 

[mwbit]

Yes they are stable musically to 1ohm
I however would not hook up 4 x 12"/4ohm subs to a bridged pair of channels on a AP.
You can take a 150.6 AP and run a 2way plus sub..like a JL W7 which is 3ohms..
I have a client doing this exact setup with zero issues.
He purchased a Z150.6ap from us for this exact reason..

This is a true statement. I am that client. In addition to the w7, I've been running it @ 2 ohm bridged on a hertz MP 300 and things are good...
Excellent sounding amp. I'm not going to lie, I have some concern running bridged at these lower ohms...but Zapco says it's stable...and it is. Time will tell. The amp gets hot but nothing crazy. It is well ventilated and I tend to bump for about 30 minutes on my commute, on average...
And shoutout again to @MCLSOUND for being a great seller.

 

[MCLSOUND]

Your happy
I'm happy..lol
Good to hear

 

[MCLSOUND]

Just got the new Zapco AP 300.2 and 600.2 in stock..
And the ADSP Z16 IV-12A AND ADSP Z12 IV 10A
Sweet little monsters.
Still waiting on the Z2000.1AP and CB100s