Big street class amp test!!!
Originally posted by Xiph0id:
How come you guys din't include this amp in the test. I'm sure it would walk all over them all.
X
How come you guys din't include this amp in the test. I'm sure it would walk all over them all.
X
Look out, it's gonna break!!
Originally posted by Dave_MacKinnon:
Nice work on the testing guys..
Since you are indeed shooting for a street class, be sure and measure the input current and voltage so you can get an efficiency number.
Nice work on the testing guys..
Since you are indeed shooting for a street class, be sure and measure the input current and voltage so you can get an efficiency number.
This may change soon though.
X
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You care about efficiency 'because' you only have one battery. The efficient one will be the louder one - unless something weird happens.
Also, you will want to note this, because odds are, as you go through your tests, the battery voltage - if you are only using one, is going to change.
Seege - I noticed earlier that you stated "The transformers are just another name for the torroids" This is incorrect. The torroid part is related to the fact that the wire is wound around a donut shaped core. You can have transformers or inductors wound in this manner. If you look at that amp, the gold and green circular devices are the power supply transformers. The two reddish/orange units, along with the four blue caps beside them and the two little inductors beside them represent the filtering network from the output devices. Class-D amps are notoriously noisy and these devices are required to eliminate this noise from being passed on to the speaker.
Sadly, they also consume some amounts of power. Rockford's BD amps and the big JBL GTi amps were desinged to minimize this need - though I don't think they totally eliminate it.
Also, you will want to note this, because odds are, as you go through your tests, the battery voltage - if you are only using one, is going to change.
Seege - I noticed earlier that you stated "The transformers are just another name for the torroids" This is incorrect. The torroid part is related to the fact that the wire is wound around a donut shaped core. You can have transformers or inductors wound in this manner. If you look at that amp, the gold and green circular devices are the power supply transformers. The two reddish/orange units, along with the four blue caps beside them and the two little inductors beside them represent the filtering network from the output devices. Class-D amps are notoriously noisy and these devices are required to eliminate this noise from being passed on to the speaker.
Sadly, they also consume some amounts of power. Rockford's BD amps and the big JBL GTi amps were desinged to minimize this need - though I don't think they totally eliminate it.
Originally posted by Dave_MacKinnon:
You care about efficiency 'because' you only have one battery. The efficient one will be the louder one - unless something weird happens.
Also, you will want to note this, because odds are, as you go through your tests, the battery voltage - if you are only using one, is going to change.
You care about efficiency 'because' you only have one battery. The efficient one will be the louder one - unless something weird happens.
Also, you will want to note this, because odds are, as you go through your tests, the battery voltage - if you are only using one, is going to change.
Probably Not. What I'm saying is whatch the meter.
Yes effecientcy is very important but even at 100% 1 watt don't mean crap.
We don't test power output in SPL. We test DB output.
X
[ November 25, 2004, 11:48 PM: Message edited by: Xiph0id ]
Seege - I noticed earlier that you stated "The transformers are just another name for the torroids" This is incorrect. The torroid part is related to the fact that the wire is wound around a donut shaped core. You can have transformers or inductors wound in this manner. If you look at that amp, the gold and green circular devices are the power supply transformers. The two reddish/orange units, along with the four blue caps beside them and the two little inductors beside them represent the filtering network from the output devices. Class-D amps are notoriously noisy and these devices are required to eliminate this noise from being passed on to the speaker.
Sadly, they also consume some amounts of power. Rockford's BD amps and the big JBL GTi amps were desinged to minimize this need - though I don't think they totally eliminate it.
Sadly, they also consume some amounts of power. Rockford's BD amps and the big JBL GTi amps were desinged to minimize this need - though I don't think they totally eliminate it.
[ November 25, 2004, 11:46 PM: Message edited by: seege ]
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Thanks for the third semester electronics review.
What do you call the same thing with only a single conductor? Is that a transformer? No, it's an inductor, or, if you like slang, a choke.
There are torroidal transformers and torroidal inductors - two different items.
If you follow the link below, you will find:
Torroidal transformers
http://dkc3.digikey.com/PDF/T043/1311.pdf
Torroidal inductors
http://rocky.digikey.com/WebLib/Hamm...0%20Series.pdf
What do you call the same thing with only a single conductor? Is that a transformer? No, it's an inductor, or, if you like slang, a choke.
There are torroidal transformers and torroidal inductors - two different items.
If you follow the link below, you will find:
Torroidal transformers
http://dkc3.digikey.com/PDF/T043/1311.pdf
Torroidal inductors
http://rocky.digikey.com/WebLib/Hamm...0%20Series.pdf
