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Crushing volume, 2 killer effects, and pure SWR tone. The SWR 750x is the first upgrade to the highest-powered mono professional bass amplifier, the Bass 750. In add... Learn more... 45 People Rated: 4.5 out of 5

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SWR SM500 Classic Series Bass Amplifier Head (500 Watts)

4-band paragraphic EQ. Tube preamp. 12 People rated this product:

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Manufacturer's Description for SWR SM500 Classic Series Bass Amplifier Head (500 Watts)

This advanced head features stereo or mono operation (250 watts per side or 500W mono at 4 ohms), precision 4-band paragraphic EQ plus Bass, Treble, and Transparency controls (all EQ is +/-15dB cut/boost). Paragraphic EQ provides frequency sweep knobs and a level slider for each band. The SM500 has a tube preamp, an adjustable Limiter, SWR's famous Aural Enhancer, a sidechain Effects Loop with Blend control, Speakon and 1/4" outputs, and an XLR Direct Out with switching for Line/Direct mode. All this power, versatility, and tone from an amp only 20 lbs. in weight. This is a serious professional amp, the best bass head SWR offers.

Front Panel Features
- Dual independent input jacks compatible for both active and passive instruments

- Gain control with LED peak clipping indicator

- Limiter with variable threshold control

- Aural Enhancer Control

- Bass Control +15dB - 15dB (shelving point 80 Hz)

- Treble Control +15dB - 15dB (shelving point 2 KHz)

- Transparency Control +15dB - 15dB (shelving point 5 KHz)

- Variable Graphic Equalizer +15dB - 15dB:
Band One: 40 Hz to 160 Hz
Band Two: 80 Hz to 320 Hz
Band Three: 200 Hz to 800 Hz
Band Four: 400 Hz to 1600 Hz

- Effects Blend Control

- Dual Concentric (Stereo) Master Volume Control

- Rack Handles

- Speaker On/Off Switch

- Power On/Off Switch

Rear Panel Features:
- Side Chain Effects Loop

- Tuner Output

- Balanced XLR Output with select switch for Line or Direct Mode, ground lift and pad control

- Power Amp Assign Switch selects Bridge or Stereo Mode

Speaker Outputs:
- Two 1/4" jacks each for Left and Right Stereo Out

- One Speakon jack for Left and Right Side Output

- One Speakon Output Jack for Mono Operation

- Speaker fuses (x2): 3AG, 8 Amp, Fast Blo

- Line Fuse: 3AG, 7 Amp, Slow Blo

Internal Features
(1) 12AX7 Preamp Tube Cooling fan zZounds is an authorized dealer of SWR products.

Frequency Response: 10Hz and 40KHz (Power Amplifier)

Dimensions (H x W x D): 3.5 x 19 x 13.375 in.

Weight: 20 lbs.

Power Output
Bridge/Mono Mode:
500 Watts @ 4 Ohms
400 Watts @ 8 Ohms
250 Watts @ 16 Ohms
(minimum load = 4 Ohms)

Stereo Mode (per side):
300 watts @ 2 Ohms
250 watts @ 4 Ohms
150 watts @ 8 Ohms
(minimum load = 2 Ohms)

Sensitivity
Full output under clipping, 8 ohms load, 100 Hz

Passive Input Jack: 38 millivolts

Active Input Jack: 155 millivolts

Power Amplifier (Effects Return Jack "in"): .5 volts

Signal To Noise Ratio: -72 dB(<10 millivolts typical)

Equivalent Input Noise: 9 microvolts

Input Impedance
Passive/Active Input: 800K Ohms

Active Input: 60K Ohms

Effects Return: 27K Ohms

Output Impedance
Effects Send: 100 Ohms

XLR Balanced Out: 750 Ohms

Owner's Manual

SWR Warranty

SWR Warranty

If you have additional warranty questions, please call the manufacturer at 818-253-4797

zZounds is an
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Our extended 30-Day 100% Satisfaction Guarantee applies on this product. Buy it, and if it isn't just right for you, return it!

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What Our Customers Are Saying About zZounds "zZounds matched their competitor's lower price, shipped to me for FREE, and then my package arrived the next day. Unbelievable." - customer on January 30th, 2012

Customer Reviews

4 out of 5 (12 ratings) Rate and Review This Product

Read 1 SWR SM500 Classic Series Bass Amplifier Head (500 Watts) Review

SWR SM500 Bass Head Customer Review

Overall: Used this head for about 1.5 years and started to have problems with it. I would say that the tone qualities are fine (if you aren't looking for an SVT type growl) - smooth and punchy although it has that 'typical' Eden/SWR loudness button sound. My problem with this head was that it didn't hold up in the face of constant use. It started to cut out on me (overheating, I think, although the road case was very well ventilated). Also, there has always been some kind of grounding problem with the amp. Not sure if it is just at the Di out or what. Also, very annoyingly, the speaker cutout doesn't mute the DI signal, so you can't tune silently by throwing that switch. The cab will be muted but if you are running a DI line, your signal will still hit the fronts. This necessitates a separate cutout pedal. (Maybe that floor model white(Boss?) tuner automatically cuts the output when you step on it but I use a TU2 and it doesn't have that functionality. The knobs ten to fall off and the caps for the knobs also fall off easily. For the price, you should at least look into a dedicated pre-amp matched up with a used Crest or maybe QSC power amp, or whatever is your fav.

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Read 1 SWR SM500 Classic Series Bass Amplifier Head (500 Watts) Review

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Available on
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Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

Fast approval.: We approve everyone, with very few exceptions, as long as we can verify your identity.
No interest. Ever.: It's just as if you paid the whole amount up front!
No paperwork. Nothing to track.: No application to mail or fax, no bills to pay. We automatically charge the payments to your credit card.

We'll wait on your money so you don't have to wait for your gear!

When you checkout, just click the Play as you Pay checkbox to indicate which installment plan you wish to use.

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We'll beat any price: Really. It's not a problem for us. In fact, we'll thank you for the chance to live up to our lowest price guarantee!
It's fast and easy: Just tell us where you saw the lower price - another website, an email offer, your local store - and we'll send you our lowest price offer in a matter of hours.
Simply click the Seen it for less? link: Next to the item you want, or give us a call at 800-zZounds (800-996-8637).

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Fast, reliable delivery: We have warehouses on both coasts, so most shipments arrive in 3 days or less.
We don't collect sales tax. Bonus!: Only NJ residents pay tax during checkout.

Available on
orders $249+

learn more

Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

Fast approval.: We approve everyone, with very few exceptions, as long as we can verify your identity.
No interest. Ever.: It's just as if you paid the whole amount up front!
No paperwork. Nothing to track.: No application to mail or fax, no bills to pay. We automatically charge the payments to your credit card.

We'll wait on your money so you don't have to wait for your gear!

When you checkout, just click the Play as you Pay checkbox to indicate which installment plan you wish to use.

on most orders $49+

Just $2.99 on
smaller orders

Really heavy stuff might cost you a
little more

learn more

Why fight traffic and pushy salesmen when we'll bring your gear straight to your home, free of charge?

zZounds free shipping is really free!: No hidden charges or hassles on returns.
Fast, reliable delivery: We have warehouses on both coasts, so most shipments arrive in 3 days or less.
We don't collect sales tax. Bonus!: Only NJ residents pay tax during checkout.

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