4 channel class D amplifier on sub bass duty? |
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1293 |
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Heard the Linea's on sub duty Saturday, very impressed even compared to the CA18s, but as you say not cheap.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Hi mate, 4 ohm driver comment, was for OP. Have always considered what 9001 would be like, driving 2x 4 ohm drivers per side..
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Global Depopulation - Alive and Killing.
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Timebomb
Old Croc Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2716 |
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No, the Saturn 10s are nothing like most Chinese 4 channels, nothing like a Lab / FP biased amp at all... they are class D not class TD, completely different, and they sound different to all the class TD amps ive tested, imo much tighter and controlled on bass. Lots of nonsense talked in this thread... |
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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Timebomb
Old Croc Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2716 |
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Ive got a "cheap" class d here that will spank all of the above driving 4 x 8 ohm drivers, might not give you that nasty distorted sound you get from a VZ though... Just because you tested a couple of lab clones years ago that blew up does not mean there is nothing out there that will do the job.
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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The OP has 4x 4 ohm drivers. A number of experienced Macrotech repairers, have informed me, much of the bad rep/distortion reports from MA5000VZ, is due to amps not repaired with official Crown O/P transistors. Don't get me wrong, personally I would only buy QSC, Powersoft for sub, but for 2x 4 ohm drivers per channel, MA5000VZ, with full suite of "correct" O/P transistors, would sound decent.
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Global Depopulation - Alive and Killing.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Would be great if the "Superior" lab clones have improved. First time I heard one, sub notes had me almost dribbling... But few years ago, for approx 12x months in London, loads of crews bought into various Lab Clones, and pretty much everyone of them had amps go down during gigs. Many of these crews have moved on to K20s, some now on X4s.
So to me, save up for Powersoft, and life is easy. Edited by levyte357- - 12 July 2018 at 10:27am |
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Global Depopulation - Alive and Killing.
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nickyburnell
Old Croc Joined: 06 February 2005 Status: Offline Points: 4410 |
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[/QUOTE]
Ive got a "cheap" class d here that will spank all of the above driving 4 x 8 ohm drivers, might not give you that nasty distorted sound you get from a VZ though... Just because you tested a couple of lab clones years ago that blew up does not mean there is nothing out there that will do the job. [/QUOTE] Pray tell? What is this amp?
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It's everything, not everythink!
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csg
Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086 |
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its one he is trying to sell...
even top flight multi-channel amps like powersoft x series benefit hugely by mixing loads - on an X8 i would recommend 50% mid / high channels and 50% bass/ sub. Same with X4's. Im always amazed how small a proportion of the overall budget people allocate to their amplifiers. Large speaker stacks may get more interest, but without the right amps behind them its all rather pointless.
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“The fact is this is about identifying what we do best and finding more ways of doing less of it better”
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nickyburnell
Old Croc Joined: 06 February 2005 Status: Offline Points: 4410 |
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Lets look at this from an engineering angle. Why does a 4 ch amp not do it but a 2 channel (ie iNuke) can? If the 4 ch amp has completely separate modules like the JAM one then why not?
Is it because of the shared capacitance? If so then why not stop all this 1u bull and make it 2u with another 50 quids worth of capacitors? Fashion? 1u is silly, it's not needed, damn things weigh nothing anyhow so what is wrong with 2u? If Powersoft had made all theirs 2u then 1u would not be in vogue as much. So in reality something like a 4 chan Class D made into a case that was big enough with more capacitors and separate power supplies would be possible? Hey maybe two mains inlets? |
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It's everything, not everythink!
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Timebomb
Old Croc Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2716 |
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Its not just down to how many capacitors thats more to do with its burst capability than what level of current the supply can deliver.
There seems to be a few people saying "i tried xyz 4 channel amp and it wasent ideal for running heavy bass on all channels, so all other 4 channels must be the same..." Not all 4 channel amps are built the same, some have higher long term power capability vs burst capability than others, eg the 44m20 supply will give about 3KW long term, the JAM Q10 will give over 1KW per channel iirc so over 4KW total, from memory i think it was around 1.4KW per channel i will check, this new 4 channel im testing has a supply rated at 7KW for a 16K amp, its not the only factor, burst / storage capability and output stage efficiency also matter, the point im making is not all amps are the same. The original question was can a budget 4 channel amp power 4 x 4 ohm 700w bass drivers, there are many out there that can, you dont need a powersoft K10 / K20 for that... Im often amazed at how people think they must have a expensive (normally Powersoft) amp to do job (like power 4 x 700w bass drivers) when there are many very decent budget alternatives, more expensive does not equal better if its overkill for the application, And yes CSG i am selling amplifiers, much like you are selling powersoft amplifiers :)
Edited by Timebomb - 13 July 2018 at 9:16am |
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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U.Viktor
Young Croc Joined: 04 May 2010 Status: Offline Points: 716 |
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X4 is nowhere near to 2x K10 once really need to deliver power despite marketing bureau suggest.
Even on 4 Ohms. You need to -very carefully- split frequency bands across four channels to have acceptable dynamics and not collapsing power rails. |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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TB, which lab copies are you selling? In terms of original manufacturer/distributor? Any pics of innards? EDIT:After 2x years waiting, research, I once bought 4x FP10000Q lab copies, as they were some of the higher specified/better built. PSU on one of them still died, powering 1X Fane 18XB, on 1x channel. So that was the end of trying Lab copies for me. Edited by levyte357- - 13 July 2018 at 2:27pm |
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Global Depopulation - Alive and Killing.
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