Ampeg help

[martynplanes]

This might be a silly question but... If I have an SVT 450H and 2 410hlf cabs would it be ok to plug into both of them? Will there be any ohm problems or shorting out?

any help with this would be great.
Cheers

[joshwilkesbooth]

SVT 410HLF = 4 ohms
SVT 450H = 4 ohms.

So you could use one cab, but not both. To use both, you'd need a head that outputs 2 ohms.

[fenderhutz]

Originally Posted by joshwilkesbooth

SVT 410HLF = 4 ohms
SVT 450H = 4 ohms.

So you could use one cab, but not both. To use both, you'd need a head that outputs 2 ohms.

+1

Sell the 450H and get a Peavey Firebass 700 or another head that is 2ohm stable if you want to run both cabs.

[joshwilkesbooth]

Ampeg v4b imo... bring the thunder.

[rodl2005]

Does the V4B go to 2 ohms? IIRC the V4BH did only 8 & 4.

[Infidelity]

Originally Posted by rodl2005

Does the V4B go to 2 ohms? IIRC the V4BH did only 8 & 4.

It does go to 2ohm! I mean the V4b the v4bh I'm not sure..

[beans-on-toast]

If you look at the speaker out on the back of the SVT 450H amp it says: 450 watts 4 ohm load, 250 watts 8 ohm load.

Each of your cabinets is 4 ohms as others have indicated. The amp should not be operated with a load below 4 ohms so you can not just plug in the two cabs at the back of the amp.

One option you have is connecting the two cabs with a serial daisy chain. This is different than the parallel daisy chain connection that cabinets are normally linked together with.

On a 1/4" plug, the tip is + the sleeve is - . A parallel connection links your cabinets +_+ and -_- [4 ohm cab || 4 ohm cab = 2 ohms]. This is how the two 1/4" jacks at the back of your amp are wired. A serial connection links your cabinets +_-_+_- [4 ohm + 4 ohm =8 ohms].

A serial link will connect your cabinets so that the impedance is 8 ohms. The advantage is that you will have twice as many speakers so you gain volume. The disadvantage is that the output power of the amp is cut in half.

[rmkesler]

Originally Posted by joshwilkesbooth

SVT 410HLF = 4 ohms
SVT 450H = 4 ohms.

So you could use one cab, but not both. To use both, you'd need a head that outputs 2 ohms.

I didn't think that mattered with solid state amps. Just tube amps.

[BassmanPaul]

Originally Posted by joshwilkesbooth

Ampeg v4b imo... bring the thunder.

Exactly how will a 100W tube amp be louder than a 450W SS amp?? 100W may work for you but I certainly would not work for most of us.

[fenderhutz]

Originally Posted by rmkesler

I didn't think that mattered with solid state amps. Just tube amps.

That is not correct.

[joshwilkesbooth]

Originally Posted by BassmanPaul

Exactly how will a 100W tube amp be louder than a 450W SS amp?? 100W may work for you but I certainly would not work for most of us.

A 100 watt RMS v4b running through eight 10" speakers @ 2ohms is more than loud enough for any situation that you wouldn't be miced in.

btw... the "thunder" I was referring to is more about the giant balls the amp has, not necessarily the loudness.

Originally Posted by rodl2005

Does the V4B go to 2 ohms? IIRC the V4BH did only 8 & 4.

The v4bh is the 90's reissue... right? I don't know what that one does, but my early 70's v4b is switchable between 2, 4, and 8 ohms.

[BassmanPaul]

Originally Posted by joshwilkesbooth

A 100 watt RMS v4b running through eight 10" speakers @ 2ohms is more than loud enough for any situation that you wouldn't be miced in.

btw... the "thunder" I was referring to is more about the giant balls the amp has, not necessarily the loudness.

I disagree and the impedance, as long as it matches the cabinet, is of no consequence.

I find it interesting how many of us rely on having a PA at the venue capable of handling a bass. During my entire career a decent PA is the exception rather than the rule.

[AwkwardLoudness]

Originally Posted by martynplanes

This might be a silly question but... If I have an SVT 450H and 2 410hlf cabs would it be ok to plug into both of them? Will there be any ohm problems or shorting out?

Looking at the specs on Ampeg's website reveals that the amp likely has a minimum impedance of 4Ω. Running two 4Ω cabs in parallel (which is a combined 2Ω load) would cause the amp to either fail or shut off if it has a safety mechanism.

I suggest using an SVT-CL, SVT-VR, or a real vintage SVT. If you insist on a SS amp, then the SVT-8PRO would work at 2Ω.

Ampeg: Classic Series - SVT-450H

AMPEG 450H Classic Series specification:

RMS Power Output (4 Ohms): 450-Watts
RMS Power Output (8 Ohms): 275-Watts
Preamp: Solid-State
Power Amp: Solid-State
Tone Controls: 3-Band
Mid Tone Control: Ultra Mid
Graphic EQ: Yes, 9-Band
Balanced Line Out: Yes, Pre/Post w/Pad
Effects Loop: Yes
Preamp Out/Power Amp In: Yes
Dimensions (W x H x D inches): 24 x 11.5 x 13
Weight: 44 Pounds

Originally Posted by rmkesler

I didn't think that mattered with solid state amps. Just tube amps.

Solid state amps have a minimum impedance for safe operation. In most cases it's 4Ω, but some SS amp heads are stable at 2Ω.

Originally Posted by BassmanPaul

.....the impedance, as long as it matches the cabinet, is of no consequence.

That's true for tube amps.

[ButtUglyJeff]

Originally Posted by rmkesler

I didn't think that mattered with solid state amps. Just tube amps.

Tube amps have impedance switches usually, where solid state amps don't, again usually. But all amps have ranges, and its not good to use one at any other impedance...

[joshwilkesbooth]

Originally Posted by BassmanPaul

I disagree

I am ok with that! Different strokes and such.

[DBTOYS]

Originally Posted by joshwilkesbooth

SVT 410HLF = 4 ohms
SVT 450H = 4 ohms.

So you could use one cab, but not both. To use both, you'd need a head that outputs 2 ohms.

the Ampeg svt 4 pro could do this!




RMS Power Output: 300-Watts x 2/900 (mono-bridged @ 8 Ohms)
RMS Power Output: 490-Watts x 2/1200 (mono-bridged @ 4 Ohms)
RMS Power Output (2 Ohms): 600-Watts x 2
Preamp: Tubes (3 x 12AX7)
Power Amp: Solid State
Tone Controls: 3-Band
Mid Tone Control: 5-Position
Graphic EQ: Yes, 9-Band
Ultra Low/High Boosts: Yes
Balanced Line Out: Yes x 2 Pre/Post with Level
Effects Loop: Yes x 2
Preamp Out/Power Amp In: Yes x 2
Dimensions (W x H x D inches): 19 x 5.6 x 15.5
Weight: 39.5 Pounds

[joshwilkesbooth]

As a bonus, you could potentially liquefy the internal organs of anyone standing close to your rig.