12v powered Tham15...what can I expect |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Posted: 21 August 2014 at 2:34pm |
I'm hoping ye all can help me understand what's going on with this.
I'm powering a 600w 8ohm P-Audio loaded Tham 15 with one of these It's sounding pretty good but on very Bass heavy tracks it seems to 'run out of breath' and go flat, kinda 'Farty' if really loud. If that makes sense?? Is this a sign of not enough power for the driver? Is that due to the 8ohm driver being driven off this Amp? Should I consider adding a power capacitor??
Edited by Shortrope - 21 August 2014 at 2:35pm |
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Saturnus
Old Croc Joined: 13 July 2010 Location: Copenhagen Status: Offline Points: 2025 |
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A power cap might help but you also need very thick cables. You're pulling up to 55A-60A in peaks from the battery. That requires some substantial cables to avoid voltage sag at peak outputs.
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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I've a very heavy power cable to the Amp that's only about 500mm long.
Do you think my problem is a lack of power? Would you say a Cap is worth a go?? |
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My Tinnitus is coming along nicely!!
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lutkeveld
Young Croc Joined: 23 September 2013 Location: The Netherlands Status: Offline Points: 517 |
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Try to have as short and as big as possible power cable.
Edited by lutkeveld - 21 August 2014 at 4:03pm |
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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try the speaker with a bigger (mains power) amp and the same tracks and see how it sounds?
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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Check the amp isnt bottoming out and you have a suitable High pass in place so your not playing outside the drivers ability and not smacking the back of the magnet with the coil trying to play 20Hz tones with a driver that Xmax's in the 40s.
But just like you would with car audio short thick leads on both + and - and make sure the battery is nice big and chunky.... a 8A 12sla battery just wont cut the mustard. |
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If it sounds like a gorilla is trying to escape, turn it down.
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scott_fury
Registered User Joined: 28 October 2012 Location: Bristol Status: Offline Points: 319 |
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What's the subsonic filter set to?
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Subsonic is at 50hz but I'm not sure how effective it is.
I've a nice thick cable on the +ve but I could beef up the -ve alright. Plenty of Battery power, it's 110ah
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My Tinnitus is coming along nicely!!
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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If you use a heavy cable for the + use the same heavy cable for the -
Ok so your not smacking the coil play low lows as your sub sonic is set to 50Hz. Can you not tone sweep it?.... theres loads of test sweeps on youtube if you wana see you SS filter in action. |
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If it sounds like a gorilla is trying to escape, turn it down.
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2296 |
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Post a youtube vid of it? might be useful for troubleshooting
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scott_fury
Registered User Joined: 28 October 2012 Location: Bristol Status: Offline Points: 319 |
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I'd be well interested to know the result of this. Was thinking of getting one of these amps and having a HPF at 50Hz is a big reason. |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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I played a some basic test tones through it. You can still hear the 50hz which makes me sceptical as to how effective the SS filter is. Also, you could still hear a 200hz tone with low pass at 110, confusing
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My Tinnitus is coming along nicely!!
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