can someone tell me what i just bought

[Big chicken]

I just bought a sunn SPL-8720 and i have no idea what it does and how to use it.any info would be great.

[okcrum]

Google turns up

Crossovers

SPL 4320 Line level dual crossover, 2 or 3 way, Hi/Lo level controls, HF phase switch, Balanced I/O. 3.5x9.3x19
SPL 8730 Passive, 2way or 3way, 8 ohm, 1000Hz and 5000Hz in 3way, 200W (400W program) 5x7.5x20.5
SPL 8720 Passive, 2way, 8 ohm, 1000Hz, 200W (400W program) 5.44x7.5x11

[bruiser1964]

It looks like an old passive crossover..... why did you buy it if you don't know what it does?

[Plays_For_Dog]

Google and Youtube are great for problems like this...

Sorry, no experience with your new widget. Just wanted to share what I would do in effort to support your dilemma.

[Big chicken]

Originally Posted by bruiser1964

It looks like an old passive crossover..... why did you buy it if you don't know what it does?

G.A.S.S and i am building a sunn rig.but how do i hook it up/use it?

[Mr. Foxen]

I wouldn't use it until you understand what a crossover is. Shouldn't really use stuff just because you have it, unless you are trying it out to see what it does. Since this is a technical device, rather than a 'tone' one, its something to understand first. I think it will be of limited use in a bass rig.

[mikeddd]

Originally Posted by Big chicken

G.A.S.S and i am building a sunn rig.but how do i hook it up/use it?

This is gonna be good. Much hilarity will ensue...I just gotta feeling.

[bruiser1964]

I havn't used this one but it should go between the power amp and the speakers

Amp out to the input and outputs to the high and low speakers - i guess the dial must let you attenuate the high freq out?
Is the crossover freq fixed?

[tony_clifton]

As far as I know (and I know nothing about such stuff) - it's amp -> crossover -> to cab1 and cab2. One cab will do everything < 1000 hz, the other one everything > 1000 hz. If it were a crossover at 80 hz or something you could use it to drive some 18s if you want to redicoulously boost a suboctave or someting, but 1000 hz isn't really useful for a regular bass rig...

[billfitzmaurice]

Originally Posted by Big chicken

i have no idea what it does and how to use it

[RickenBoogie]

Seems like you bought a useless piece of gear- unless you're building a gigantic bi-amped rig with dedicated speakers for those frequeny points, and even then, the frequency of that particular crossover seems of no value even if you were building said gigantic biamped rig.

[lbwdog]

Don't recall ever seeing a passive crossover built into it's own case. You might could remove it and bolt it onto the back of a DIY speaker cab, but the 1000Hz point is probably not ideal. If it was 500Hz or so, you could use it to cross from a woofer to mid. Most tweeters would need a higher crossover point.

[Bmorefoozler]

A cool looking paperweight with SUNN Logo...

[sirdugh]

Originally Posted by bruiser1964

I havn't used this one but it should go between the power amp and the speakers

Amp out to the input and outputs to the high and low speakers - i guess the dial must let you attenuate the high freq out?
Is the crossover freq fixed?

Originally Posted by tony_clifton

As far as I know (and I know nothing about such stuff) - it's amp -> crossover -> to cab1 and cab2. One cab will do everything < 1000 hz, the other one everything > 1000 hz. If it were a crossover at 80 hz or something you could use it to drive some 18s if you want to redicoulously boost a suboctave or someting, but 1000 hz isn't really useful for a regular bass rig...

I'm guessing that if you put it line after the power amp, it will take care of the problem of having to figure out what to do with it......because it will destroy it.

My experience with crossovers is that it would go something like:

pre---crossover---amp1---high cab
>>>>>>>>>>>>---amp2---low cab

[Sundogue]

I have a bunch of stuff I'll sell you. I'll even sell it to you really cheap.

Pay me first, and then I'll tell you what you bought. I might even sweeten the deal and tell you how to use this stuff after you buy it!

[Bmorefoozler]

Originally Posted by sirdugh

I'm guessing that if you put it line after the power amp, it will take care of the problem of having to figure out what to do with it......because it will destroy it.

My experience with crossovers is that it would go something like:

pre---crossover---amp1---high cab
---amp2---low cab

That's for an active crossover, this is apparently a passive crossover like you find in a two way speaker cab, between the driver and tweeter, but far too low for that purpose, and far too high for a mid driver...

[251]

Originally Posted by Big chicken

I just bought a sunn SPL-8720 and i have no idea what it does and how to use it.any info would be great.

It's a passive crossover network;

http://sunn.ampage.org/sdp/index.php...e;topic=1571.0

[sirdugh]

Originally Posted by Bmorefoozler

That's for an active crossover, this is apparently a passive crossover like you find in a two way speaker cab, between the driver and tweeter, but far too low for that purpose, and far too high for a mid driver...

Ah sorry, missed the passive part.......shutting mouth now.

[tony_clifton]

Yeah, that's why it's got a wattage rating...

As far as I know Sunn amps are > 200 watts so it's useless in a Sunn rig either.