Which amp for my Tempest? (1 Viewer)

[Nathan J]

The one at parts express? (300 -794) or the adire AVA250?


The adire is more money.....is it worth it?

 

[Dustin B]

Depends. Shipping narrows the gap (provided you are going to get the Tempest and not the Dayton DVC15"). The AVA250 now has a switch to defeat the crossover which is a good thing. The AVA250 comes with the rumble filter at a nice setting. The PE300-794 now comes with the rumble filter disabled I believe, so if you want the rumble filter you have to swap out two resistors.

 

[Chris Tsutsui]

Here's another consideration...
$80 for a 120 watt plate amp from Partsexpress. You'll only lose 3.19 decibels of max output which is barely noticeable.
That PE amp is $120 while the Adire amp is $180... how would shipping narrow the gap of $60?
I'd go for the parts express 250w one

 

[Nathan J]

Parts Express it is

 

[Dustin B]

It does narrow the gap, there still is one though. I guess I'm just used to being a CDN ordering from the states. Shipping and brokerage are a real concern for me as they add up fast.

 

[Kyle Richardson]

You'll only lose 3.19 decibels of max output which is barely noticeable

For 3db it is DEFINITELY worth investing in the larger amplifier.

The biggest differences between the PE amp and the Adire amp is the crossover defeat and the rumble filter. To many those two features are not worth the added cost but to others it is well worth it.

 

[Nathan J]

I am definitely getting at LEAST a 250 watt amp for a 15" sub....

 

[Ryan Schnacke]

"The PE300-794 now comes with the rumble filter disabled I believe, so if you want the rumble filter you have to swap out two resistors. "

No, the 300-794 has the boost disabled. The rumble filter is still intact. This is done by setting the Q of the filter to 0.7 giving you a Butterworth alignment. The boosted filters have Q > 0.7

In the case of the 300-794 the cutoff frequency is 19.4Hz. You could change this cutoff frequency and maintain the Q = 0.7 by changing the resistor values but keeping R27 = 2*R26. If anyone needs resistor values for a particular boost and frequency just ask - I've built a spreadsheet that calculates them for me.

 

[Nathan J]

I just bought the -794......thanks for the help.