Trying to repair my SVS 20-39-PCPlus. Can anyone help?

[kingpk]

Had purchased a pair of SVS 20-39-PCPlus subs almost 6 years back. Enjoyed them thoroughly untill recently. In a span of 3 months, the BASH amps of both blew up. I was willing to purchase the replacement Sledge amps, but since I am in India, the added shipping and duty make the entire deal unaffordable.

I managed to fix one of the amps by replacing some minor components in the power supply unit... but the second one is tricky. Have narrowed down the defective components to a small upright PCB and a chip on which it ismounted. Can anyone identify this PCB (with Indigo written on it) and the chip and if possible also tell me where I can source them (in the US)?

I have pointed out both these parts in the attached pics. The amp is a 525W Bash amp modified (by SVS) for 220V.

Thanks in advance.

 

[Jeff R.]

Contact SVS directly. I am sure they can assist in some way. They have a strong customer service reputation.

 

[afterlife2]

I second Jeffs reply. Great service.

 

[j_garcia]

My guess is SVS will recommend a replacement amp which ends up being a significant cost for his location. I'd still contact them and perhaps they can provide a method to get the correct parts to repair the existing amp.

An alternative recommendation would be to convert them to passive and use an external amp.

 

[kingpk]

Thanks everyone.

I have taken your advice and contacted SVS directly. Waiting for their response.

Meanwhile, can you please recommend a passive amp for this sub.

 

[j_garcia]

IMO, any pro amp should work, however these types of amps don't have sub controls (phase, x-over, etc...) So you need a filtered input, like from a receiver's sub preout, that is already crossed over to feed to the amp or you could potentially damage the drivers. So Crown, QSC, Behringer, etc... I'd wait to see what SVS says first.

 

[TLS Guy]

Had purchased a pair of SVS 20-39-PCPlus subs almost 6 years back. Enjoyed them thoroughly untill recently. In a span of 3 months, the BASH amps of both blew up. I was willing to purchase the replacement Sledge amps, but since I am in India, the added shipping and duty make the entire deal unaffordable.

I managed to fix one of the amps by replacing some minor components in the power supply unit... but the second one is tricky. Have narrowed down the defective components to a small upright PCB and a chip on which it ismounted. Can anyone identify this PCB (with Indigo written on it) and the chip and if possible also tell me where I can source them (in the US)?

I have pointed out both these parts in the attached pics. The amp is a 525W Bash amp modified (by SVS) for 220V.

Thanks in advance.

You need a magnifying glass when the IC is right in front of you! What numbers are on the IC?

 

[kingpk]

You need a magnifying glass when the IC is right in front of you! What numbers are on the IC?

The chip has glue over it and the glue does not come out so one cannot read the number on the chip.

 

[kingpk]

SVS has replied that they do not have the amp schematics and cannot help me with this.

 

[TLS Guy]

SVS has replied that they do not have the amp schematics and cannot help me with this.

In that case your only options, are to contact Bash and see if they will send you a circuit, or to instal a new amp. The fact you are in India complicates matters and makes it hard for us to advise you. What pro amps are easily available to you there?

I think class D plate amps with switching power supplies, like that one has, are always to be avoided. I would never own one, and will never recommend one.

 

[Nestor]

Had purchased a pair of SVS 20-39-PCPlus subs almost 6 years back. Enjoyed them thoroughly untill recently. In a span of 3 months, the BASH amps of both blew up. I was willing to purchase the replacement Sledge amps, but since I am in India, the added shipping and duty make the entire deal unaffordable.

I managed to fix one of the amps by replacing some minor components in the power supply unit... but the second one is tricky. Have narrowed down the defective components to a small upright PCB and a chip on which it ismounted. Can anyone identify this PCB (with Indigo written on it) and the chip and if possible also tell me where I can source them (in the US)?

I have pointed out both these parts in the attached pics. The amp is a 525W Bash amp modified (by SVS) for 220V.

Thanks in advance.

What about retrofitting an equivalent BASH amp? Are they available in India?

 

[kingpk]

What about retrofitting an equivalent BASH amp? Are they available in India?

Equivalent BASH amps are not available in India, but I can order them from the US and get them delivered in India. The problem is that India power supply is 220V (like Europe). Can you point me to any equivalent BASH amp?

Thanks.

 

[kingpk]

In that case your only options, are to contact Bash and see if they will send you a circuit, or to instal a new amp. The fact you are in India complicates matters and makes it hard for us to advise you. What pro amps are easily available to you there?

I think class D plate amps with switching power supplies, like that one has, are always to be avoided. I would never own one, and will never recommend one.

How do I contact BASH?

I am willing to order amps from the US and get them delivered to India. The constraint is that India power supply is 220V. Please advise.

Thanks.

 

[mike c]

email SVS if they can configure a sledge amp to work on your subwoofer model.

if yes,

Audire Technologies
No. 235D,
Mettupalayam Road,
Thudiyalur, Coimbatore
Tamil Nadu, 641034
Phone: +917708134600
+919894722600
Email (general): info@audire.in
Email: sandeep@audire.in
Website: Audire : High End Audio, Video and Automation

 

[Ed Mullen]

SVS has replied that they do not have the amp schematics and cannot help me with this.

Unfortunately, that is correct. The amp supplier considers the schematics to be IP and we do not have them. If we did - we would surely provide them so you could repair the amp.

We no longer stock the BASH 525W platform. The Sledge 800W platform is a drop-in replacement and we can flash the microprocessor with a custom file for your model subwoofer. We can also offer you a discount over the normal price for that amp.

Regarding your import cost situation, if SVS ships to an international location, we must include all the appropriate paperwork, including the value of the product. However, SVS can ship anywhere in the continental USA at no-charge and you do have the option of then using your own freight forwarder to import the amp.

 

[kingpk]

Thanks everyone. I finally gave up trying to repair the amp and ordered a replacement from SVS. In future I will be more inclined towards passive subs.

 

[AcuDefTechGuy]

Equivalent BASH amps are not available in India, but I can order them from the US and get them delivered in India. The problem is that India power supply is 220V (like Europe). Can you point me to any equivalent BASH amp?

Thanks.

Thanks everyone. I finally gave up trying to repair the amp and ordered a replacement from SVS. In future I will be more inclined towards passive subs.

Another reason I prefer unpowered (externally powered) subs - you can use any external amp to power them. 100% of my subs (11 of them) are unpowered.

More amp companies should unpowered subs. Funk Audio offers unpowered subs. RBH does too. The EQ/DSP/Amp can be external.

 

[Irvrobinson]

Another reason I prefer unpowered subs - you can use any external amp to power them. 100% of my subs (11 of them) are unpowered.

Passive subs have their attractions, but then equalization is DIY. As someone sitting around with extra amp channels I can see the temptation, but a fully developed and tested solution seems like a better choice for a lot of people, especially those who don't run room correction systems.

 

[AcuDefTechGuy]

Passive subs have their attractions, but then equalization is DIY. As someone sitting around with extra amp channels I can see the temptation, but a fully developed and tested solution seems like a better choice for a lot of people, especially those who don't run room correction systems.

The new Funk flagship 18.2 sub is unpowered - externally powered. The DSP/EQ/Amp is external.

The EQ can be done with any processor with Audyssey, ARC, etc.

I use the Denon Audyssey XT Dynamic EQ. Works amazing.

Are the Sub EQ feature in Velodyne, SVS, Rythmik, Seaton, etc., better than Audyssey XT32 dual Sub EQ or ARC Sub EQ? I don't t think so.

Even if I had a powered sub with internal EQ, I would still use the Denon Audyssey Sub EQ DEQ.

And for those who use analog-only system w/o Audyssey or other forms of EQ (like I once did for years), I say get some.

 

[Irvrobinson]

The new Funk flagship 18.2 sub is unpowered - externally powered. The DSP/EQ/Amp is external.

The physical location of the electronics is irrelevant. It is still intended to be a fully integrated solution. An FA rep (I can't remember his name) told you that in another thread.

The EQ can be done with any processor with Audyssey, ARC, etc.

I use the Denon Audyssey XT Dynamic EQ. Works amazing.

With all due respect, ADTG, you also thought your system was amazing before your engaged Dynamic EQ. Unless you do some measuring you really don't know what you're listening to.

Are the Sub EQ feature in Velodyne, SVS, Rythmik, Seaton, etc., better than Audyssey XT32 dual Sub EQ or ARC Sub EQ? I don't t think so.

If you're talking about the auto-EQ features, I can only speak to Velodyne's, and it has been documented in AH reviews, and corroborated in my testing, as being quite poor. But I'm talking about the EQ used in the design of the subs themselves, especially sealed subs.

Even if I had a powered sub with internal EQ, I would still use the Denon Audyssey Sub EQ DEQ.

And for those who use analog-only system w/o Audyssey or other forms of EQ (like I once did for years), I say get some.

Perhaps I'm letting my skeptical nature get the best of me, but after reading the material on Audyssey I suspect a better alternative is manual EQ in conjunction with a room measurement system. I wish I had access to an Audyssey component in my system, just so I could measure the results and see what it's doing, and compare it to what I achieved manually with the PEQs in the sub amp.