bridgeable
 

"Theo" theo*+*@*+*letsblowitup*.*com wrote in message
. uk...
Trevor Wilson wrote:
"Theo" theo*+*@*+*letsblowitup*.*com wrote in message
.uk...
Fleetie wrote:
"Theo" theo*+*@*+*letsblowitup*.*com wrote
Fleetie wrote:
any other idea's then martin? i want a mono setup ideally.

I'm sure they'll be fine for your application. I mean how many
watts do you really need?!


Martin

I dont know anything about power speccin, the speakers are 2 x 350w
bass drivers with a low pass filter

Well I dunno. How big is your room and how loud do you like it?

Others will need to help you on this. I doubt you need 700W of bass
in a domestic setting! 200W ought to be enough at a guess.


Martin

I like it loud, Ive already got 8 speakers. :)

**Then look for efficiency.

sorry im clueless at this?

**Think of it this way:

A speaker with an efficiency of (say) 87dB/W/M, with 100 Watts up it's bum,
sounds as loud as a speaker with an efficiency of 90dB/W/M with 50 Watts up
it's bum. Likewise, a speaker with 96dB/W/M with 12.5 Watts up it's bum
sounds as loud as your 87dB/W/M speaker with 100 Watts. Neat huh?

For some reason, my original post disappeared. Here is what I wrote a few
days ago:

---
how can I tell if either of my amps are bridgeable, I want to run a
subwoofer in mono and I have no manuals for either...

sherwood AX4103
denon PMA-720

**All amplifiers (save a minute number) are bridgeable. What dictates the
success of such an operation are the following:

* The MINIMUM impedance of the speaker.
* The MINIMUM impedance that the amplifier is rated to drive.

Divide the minimum impedance of the speaker (not the average impedance,
which is the usually supplied figure) by 2. If that figure is lower than the
minimum impedance rating of your amplifier, then you can't do it.

Some general rules of thumb (or is that thumbs).

* Unless the manufacturer provides specific switching, or bridging adaptors,
they should not be bridged.
* Very few Denon amps can be successfully bridged into less than 8 Ohm
loads.
* Since Sherwood amps are generally crap, they cannot be bridged into ANY
speaker.
---

--
Trevor Wilson
www.rageaudio.com.au

bridgeable
 

"Trevor Wilson" wrote in message


**All amplifiers (save a minute number) are bridgeable. What dictates
the success of such an operation are the following:

* The MINIMUM impedance of the speaker.
* The MINIMUM impedance that the amplifier is rated to drive.

These are *the* salient points. There is some wiggle room if you consider
how hard you intend to push the resulting bridged configuration. However,
its reasonable to think that if you bridge amps, you're going to push them
hard.

Divide the minimum impedance of the speaker (not the average
impedance, which is the usually supplied figure) by 2. If that figure
is lower than the minimum impedance rating of your amplifier, then
you can't do it.

Exactly.

Some general rules of thumb (or is that thumbs).

* Unless the manufacturer provides specific switching, or bridging
adaptors, they should not be bridged.

A conservative rule.

* Very few Denon amps can be successfully bridged into less than 8 Ohm
loads.

I'll defer to practical experience in this regard.

* Since Sherwood amps are generally crap, they cannot be bridged into
ANY speaker.

Given their pricing and visible construction features, no surprise.

bridgeable
 

"Pooh Bear" wrote in message
...
Theo wrote:

Eiron wrote:
Theo wrote:

Trevor Wilson wrote:

"Theo" theo*+*@*+*letsblowitup*.*com wrote in message
.uk...

how can I tell if either of my amps are bridgeable, I want to run a
subwoofer in mono and I have no manuals for either...

sherwood AX4103
denon PMA-720

**All amplifiers (save a minute number) are bridgeable. What
dictates the success of such an operation are the following:

* The MINIMUM impedance of the speaker.
* The MINIMUM impedance that the amplifier is rated to drive.

Divide the minimum impedance of the speaker (not the average
impedance, which is the usually supplied figure) by 2. If that
figure is lower than the minimum impedance rating of your
amplifier, then you can't do it.
Some general rules of thumb (or is that thumbs).

* Unless the manufacturer provides specific switching, or bridging
adaptors, they should not be bridged.
* Very few Denon amps can be successfully bridged into less than 8
Ohm loads.
* Since Sherwood amps are generally crap, they cannot be bridged
into ANY speaker.


whats the best option for driving my sub then? new amp or is there
another way?

Just use one channel of the power amp.

one side of it? is that safe

Totally.


Graham




I can seperate my two drivers into L + R, would that be better?

bridgeable
 

Theo wrote:

"Pooh Bear" wrote in message
...
Theo wrote:

Eiron wrote:
Theo wrote:

Trevor Wilson wrote:

"Theo" theo*+*@*+*letsblowitup*.*com wrote in message
.uk...

how can I tell if either of my amps are bridgeable, I want to run a
subwoofer in mono and I have no manuals for either...

sherwood AX4103
denon PMA-720

**All amplifiers (save a minute number) are bridgeable. What
dictates the success of such an operation are the following:

* The MINIMUM impedance of the speaker.
* The MINIMUM impedance that the amplifier is rated to drive.

Divide the minimum impedance of the speaker (not the average
impedance, which is the usually supplied figure) by 2. If that
figure is lower than the minimum impedance rating of your
amplifier, then you can't do it.
Some general rules of thumb (or is that thumbs).

* Unless the manufacturer provides specific switching, or bridging
adaptors, they should not be bridged.
* Very few Denon amps can be successfully bridged into less than 8
Ohm loads.
* Since Sherwood amps are generally crap, they cannot be bridged
into ANY speaker.


whats the best option for driving my sub then? new amp or is there
another way?

Just use one channel of the power amp.

one side of it? is that safe

Totally.


Graham


I can seperate my two drivers into L + R, would that be better?

In the same box ?

Not really.

Mind boggles.


Graham