SWR 350X Pro Series Bass Amplifier Head (350 Watts)
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zZounds Gear Experts Say...
Limiter. Aural Enhancer.
Overview
Improving on greatness. SWR's 350x is the third in a series of upgrades to SWR's top-selling Bass 350 amplifier. In addition to new chassis graphics featuring the SWR logo badge in classic chrome the 350x has inherited the SWR Mo Bass' popular SubWave effect, which produces a clean, pure and accurate octave effect. A Subwave Footswitch with a hardwired 1/4 in. cable (for connection purposes) ships with the 350x as an added bonus.
Front Panel Features
Ultra-High-Polished Aluminum Front Panel
Dual independent input jacks compatible for both active and passive instruments
Gain control with LED peak clipping indicator
Exclusive Aural Enhancer circuitry
Subwave (with Level control)
Subwave Illuminated on/off switch
Limiter
Limiter Defeat Switch
Active bass and treble controls
Variable mid-range EQ
Effects Blend Control
Master Volume Control
Rack mountable
Chrome Rack Handles
Power On/Off Switch
Aluminum chassis
Rear Panel Features
Sidechain mono effects loop
Balanced XLR Output
XLR Mode Switch (Direct, Line, or Direct + Sub)
Tuner Send
Subwave Footswitch Jack
Fan Defeat Switch
Two 1/4 in. Speaker Output Jacks
Two Speakon Output Jacks
Speaker fuse: 3AG, 10 Amp, Fast Blo
Line Fuse: 3AG, 8 Amp, Slow Blo
AC Line Receptacle
Internal Features
All tube preamp gain stages
(1) 12AX7 Preamp Tube
Cooling Fan
Front Panel Features
Ultra-High-Polished Aluminum Front Panel
Dual independent input jacks compatible for both active and passive instruments
Gain control with LED peak clipping indicator
Exclusive Aural Enhancer circuitry
Subwave (with Level control)
Subwave Illuminated on/off switch
Limiter
Limiter Defeat Switch
Active bass and treble controls
Variable mid-range EQ
Effects Blend Control
Master Volume Control
Rack mountable
Chrome Rack Handles
Power On/Off Switch
Aluminum chassis
Rear Panel Features
Sidechain mono effects loop
Balanced XLR Output
XLR Mode Switch (Direct, Line, or Direct + Sub)
Tuner Send
Subwave Footswitch Jack
Fan Defeat Switch
Two 1/4 in. Speaker Output Jacks
Two Speakon Output Jacks
Speaker fuse: 3AG, 10 Amp, Fast Blo
Line Fuse: 3AG, 8 Amp, Slow Blo
AC Line Receptacle
Internal Features
All tube preamp gain stages
(1) 12AX7 Preamp Tube
Cooling Fan
Specs
Frequency Response (Power Amplifier): -3dB @ 20Hz and 40KHz
Dimensions (W x H x D): 19 x 3.5 x 12.25 in.
Weight: 17 lbs.
Power Output:
450 Watts @ 2 ohms
350 Watts @ 4 ohms
240 Watts @ 8 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
Tuner Send: 100 Ohms
XLR Balanced Out: 750 Ohms
Dimensions (W x H x D): 19 x 3.5 x 12.25 in.
Weight: 17 lbs.
Power Output:
450 Watts @ 2 ohms
350 Watts @ 4 ohms
240 Watts @ 8 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
Tuner Send: 100 Ohms
XLR Balanced Out: 750 Ohms
Reviews
Reviewers gave this product an overall rating of 4.5 out of 5 stars.
(28 ratings)
Submitted April 24, 2007 by a customer from wellsfargo.com
"I can't imagine ever needing another amp."
I tend to hold on to equipment for a long time once it suits me. This was purchased for live applications on larger stages (I always run through the board, so filling the room is not a consideration for me) and it works quite well (I use the 2004 for rehearsals). If I were to discontinue using this it would be simply because I wouldn't need to haul around the 4-space rack I have it in. No big deal, though. I can see using this forever; more power (God forbid I ever need that) would simply require an additional power amp (I have three Crowns lying around that would fit the bill).
Sound
Full, round, picks up every nuance and brings them to the front. Nothing beats a tube pre-amp for warmth. I've used it to play everything from Classic Rock to country to jazz and have been able to create exactly the sound I've wanted. I run this through a Workingman's 4x10 and 1x15 cab (replaced the latter's speaker with an Eminence Omega Pro for added depth on larger stages). Can't say enough about the line-out, either -- sound guys notice right away that I'm sending a tube-driven signal and love it.
Features
Very easy to dial in any sound -- simple, straightforward controls. My only complaint is that it lacks the transparency knob that my SWR 2004 has. The subwave tracks well, and once you get past its novelty and learn to leave it on in the background it's very effective.
Ease of Use
Very… read more fast sound set up. Unlike other amps, shifting mids does not throw you into some parametric thing that takes ten minutes to sort out. Smooth curve on all controls -- no exponential increases to speak of. The manual (worth the read) is written for anyone to understand and does a great job of explaining functionality. Try the sample tone suggestions as a starting point.
Quality
A tank -- all hand-wired, solid components. You can't move the tube from its socket without effort (a good thing). The shiny chrome face is easy enough to scratch, though -- watch out for rack rash.
Value
Simple, easy to use. GREAT sound, plenty of power and headroom. Warm tone, but defined -- and extremely variable. The aural enhancer is there for a reason -- use it.
Manufacturer Support
(Haven't had to use it.)
The Wow Factor
Who doesn't like chrome? It's un-American not to! Seriously, though -- well put-together, attractive package, functionally simple and straightforward. A great amp. I'd say it's the best sound I've developed in 35 years of playing, much of it professionally. The fact that it looks great is only a plus, and did not at all figure in my selection of this amplifier.
Musical Background:
Professionally for 20 of 35 years playing. Now just a half-dozen times annually.
Musical Style:
Classic rock, modern rock, country. read less
Sound
Full, round, picks up every nuance and brings them to the front. Nothing beats a tube pre-amp for warmth. I've used it to play everything from Classic Rock to country to jazz and have been able to create exactly the sound I've wanted. I run this through a Workingman's 4x10 and 1x15 cab (replaced the latter's speaker with an Eminence Omega Pro for added depth on larger stages). Can't say enough about the line-out, either -- sound guys notice right away that I'm sending a tube-driven signal and love it.
Features
Very easy to dial in any sound -- simple, straightforward controls. My only complaint is that it lacks the transparency knob that my SWR 2004 has. The subwave tracks well, and once you get past its novelty and learn to leave it on in the background it's very effective.
Ease of Use
Very… read more fast sound set up. Unlike other amps, shifting mids does not throw you into some parametric thing that takes ten minutes to sort out. Smooth curve on all controls -- no exponential increases to speak of. The manual (worth the read) is written for anyone to understand and does a great job of explaining functionality. Try the sample tone suggestions as a starting point.
Quality
A tank -- all hand-wired, solid components. You can't move the tube from its socket without effort (a good thing). The shiny chrome face is easy enough to scratch, though -- watch out for rack rash.
Value
Simple, easy to use. GREAT sound, plenty of power and headroom. Warm tone, but defined -- and extremely variable. The aural enhancer is there for a reason -- use it.
Manufacturer Support
(Haven't had to use it.)
The Wow Factor
Who doesn't like chrome? It's un-American not to! Seriously, though -- well put-together, attractive package, functionally simple and straightforward. A great amp. I'd say it's the best sound I've developed in 35 years of playing, much of it professionally. The fact that it looks great is only a plus, and did not at all figure in my selection of this amplifier.
Musical Background:
Professionally for 20 of 35 years playing. Now just a half-dozen times annually.
Musical Style:
Classic rock, modern rock, country. read less
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