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TC RH450 Club

had an rh450 for a few years now and have always loved it! Almost got an OTB500 but was put off by the lack of control over the mids (therefore shortage of tones available). Was running an rs210 through it but treated myself to an f112 (which is as good as they say btw). I've been pushing the f112 with a Carvin bx1600 but always find myself missing the presets, tuner, spectra comp and tubetone of the rh450 so rather than fork out for all the pedals to do this I'll be using the pre from the rh450 through the power amp of the bx1600 - problem solved
never understood the
dislike some people have for this amp - nothing else I've seen on the market over the past 5 years comes close to the feature set this comes with and you'd need to spend hundreds on pedals to get back everything you lose when moving away from an an rh450/750!
I must add that I am spoiled by the RH450 features & foot pedal . I drive an Eden 2x10 XST with it
and now hearing about your F 112 I've got GAS for a cab. Maybe need to spoil myself again. lol
 
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Hey guys, something is a bit strange with my RH450 and I wanted to ask you if it is normal for this unit.
1- No matter what I do, there are some really boomy lows, like my RH cries for a low cut.
2- Low mids pot acts strange. If I set it at 0 (12 o clock), then I press shift and play with the frequency it changes the sound, like I have a boost or cut (boost more likely). The sound should stay unchanged no matter how I turn the button in shift mode.
Thanks
 
Hey guys, something is a bit strange with my RH450 and I wanted to ask you if it is normal for this unit.
1- No matter what I do, there are some really boomy lows, like my RH cries for a low cut.
2- Low mids pot acts strange. If I set it at 0 (12 o clock), then I press shift and play with the frequency it changes the sound, like I have a boost or cut (boost more likely). The sound should stay unchanged no matter how I turn the button in shift mode.
Thanks

IIRC when you press the shift control and you turn the knob you are actually controlling the frequency at which that tone control operates at. There's some frequency overlap between the different tone controls.

I haven't actually messed around with my 450 very much because I pretty much have it dialed in where I want it now. But you should be able to hit that shift button and then turn it to get it where you like the tone frequency and then exit that mode and then the tone control will interact at that frequency.
 
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What do you have the bass control set to? It's possible that shifting the low-mid frequency, while set "flat" alters the knee (or width) in the bass control range.

For what it's worth, I often find my RH450 and RH750 are a bit boomy, and I run them with the bass control rolled off a little bit.

Do a complete reset of the amp as others have indicated and see if it still does it.
 
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So after reset is the same, except I noticed now high mids act the same. So to be clear, all controls are at 12ve o clock, factory reset. Press shift and when turning low mids and high mids the sound changes. Being in neutral position, changing the frequency center should have no effect.
Can you check if yours is the same please?
 
Having used a RH450, which was supplied by the PA provider at a recent Denmark gig, I was sold. I am currently awaiting delivery of a RH450 and RC4.
Apologies if this has already been covered but if the amp is capable of operating 3x cabs at 2.66 ohms (as TCE's Power Management statement) then how many watts will it produce when operating at 4 ohms? Will i need to run 3 cabs to realise the full potential of the amp?
 
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Electrically, that amplifier can burst to about 250 Watts to the speaker at 4 ohms or less. However the DSP in it does some interesting things to make it a very loud sounding amp. I still have mine, although I switched to an RH750 about a year ago when one came up for a good price. I love their sound!

In fact, I'm a bit nervous about what to do if/when it breaks. Aside from a big honking' SVT, nothing out there can really do what the RH series heads do so well.

EDIT: One other thing: don't be surprised if your RC4 immediately does a firmware update from the amplifier when you plug it in. It only takes about 30 seconds and it's likely to happen the first time you use it.

Having used a RH450, which was supplied by the PA provider at a recent Denmark gig, I was sold. I am currently awaiting delivery of a RH450 and RC4.
Apologies if this has already been covered but if the amp is capable of operating 3x cabs at 2.66 ohms (as TCE's Power Management statement) then how many watts will it produce when operating at 4 ohms? Will i need to run 3 cabs to realise the full potential of the amp?
 
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Having used a RH450, which was supplied by the PA provider at a recent Denmark gig, I was sold. I am currently awaiting delivery of a RH450 and RC4.
Apologies if this has already been covered but if the amp is capable of operating 3x cabs at 2.66 ohms (as TCE's Power Management statement) then how many watts will it produce when operating at 4 ohms? Will i need to run 3 cabs to realise the full potential of the amp?

First get ready for the naysayers to chime in with the same old tc lied to us about power ratings. The tc RH threads are full of it. IDK maybe they've calmed down by now.

As fas a rated power goes. You should get the same power at 4 ohms as you do at 2.66. Tc uses a "reactive" type of wattage rating which if explained doesn't really tell you much. I own a RH450 and two RS112 cabs and it's damn loud.

There's a thread on it here. My advice just crank it and enjoy it. I love mine.

TC Electronics RH450 Quasi-Wattage Ratings Discussion Thread
 
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Electrically, that amplifier can burst to about 250 Watts to the speaker at 4 ohms or less. However the DSP in it does some interesting things to make it a very loud sounding amp. I still have mine, although I switched to an RH750 about a year ago when one came up for a good price. I love their sound!

I never bought
Off on the 250 watt thing. I used to own a BH250 and also my RH450. Into the same speakers RS112's @4 ohms the RH was noticeably, as in WAY louder in volume with lots more usable headroom.

I've played bass since 69 and have used all the so-called "iconic" rigs over the years. I trust my ears more than printed specs and the RH450 is plenty loud regardless of what kind of rating system tc uses. I've got a 100 watt 74 Showman head here and the RH450 easily trounces that in volume and a 100 watt tube amp is powerful. Hell at one time that's all we bassists had to use. The true power tube saturation of the Showman wins that battle but the tube drive circuit in the 450 gets close.

Keep low
 
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Don't get me wrong, it's a great amp, but I believe it's electronically impossible for the RH450 to generate more than about 250 watts out to the speaker. The amplifier is severely current limited to protect it.
There is way more than just wattage that affects how loud you sound. The RH cabinets have excellent sensitivity. They don't require much power to be loud. they're also very mid-forward which contributes to their volume. Loudness over time is very high on those amps.

So regardless of how many watts you think it's generating, it's not, because it can't. The BH amplifiers do not do the same thing to the power output section. They have far less exotic processing onboard.

I use mine to drive either an EA CXL112 or one or a pair of Hartke 112HD speakers, and it's loud enough to play the larges spaces I've ever played - large sport stadiums or very large clubs.

Otherwise, if it wasn't enough, I'd just run an IEM rig because anything requiring that much onstage sound now usually gets pushed to IEMs. That's ok, because I can run the RH amp into my IEM setup as my preamp and it works great that way too.



I never bought
Off on the 250 watt thing. I used to own a BH250 and also my RH450. Into the same speakers RS112's @4 ohms the RH was noticeably, as in WAY louder in volume with lots more usable headroom.
 
One thing to keep in mind is that the three-cabinet option is only recommended for their cabinets.
They had their drivers engineered to have impedance characteristics which allowed them to run as three "8 ohm" cabs at once, safely. Part of that comes from the custom drivers TC had Eminence make for them.

I do not recommend doing three cabs of another brand with the TC head. I know a few who tried it ended up with hair-trigger amp shutdown as the speakers fell too far outside the acceptable specifications to run as a set of three.

Besides, I can't really see a reason to use three large cabs with the amp. It's hellishly loud with two 4x10s or 2 1x12s.

Thanks for your replies guys. I know TCE come in for some flack over the ratings of their heads but I love the tone and features. If things are a little quiet at least I can add that third cab and move more air!
 
I didn't know about this club thread :)
I love my RH450 that I bought used in the classifieds here. I don't care about the ratings frenzy that went on. It's plenty loud enough for my needs. For small to medium shows I use it with a 4 ohm Schroeder Mini 12+L. I was really surprised at how well this combo does, and the cab at just 19 pounds makes things so easy. I have a fold-up stand that slightly elevates and angles it. For bigger shows, I use it with my 4 ohm Bergantino AE410, and it's plenty for everything I need to do.

I don't use any of the programmable preset features, as I don't need them. I love the compression and the tube tone and the built in tuner. I played it through an Ampeg 810 that was backlined at a festival in early summer (unplugged the SVT 4PRO that they supplied), and it just killed.

I play fretless almost exclusively, and I'm able to get such a rich, warm mid-range through the eq, compression, and tubetone interplay ... It's pretty much perfect for me.
 
Hah! I'm pretty much using every feature on it. I use the presets to switch between fretted, fretless, and upright settings which are all quite different. I use the Tubetone on everything - including upright. My upright preset actually has a tonne of compression with a fair amount of Tubetone on it and it's virtually impossible to think it sounds like a bass guitar. I also have the EQ points adjusted lower.

The other thing I really like about it is the ultra-high input impedance. I don't need any kind of pre-amp to run the upright into it.

For bass guitar, I find the Tubetone responds to my TRB better than my Lakland, though. When I used to use my Lakland more, I found the bottom-end sound on the 55-02 tended to make the Tubetone pound a little too hard. It's way more musical with my TRB and I can run it a bit hotter.

A few times I've also run it as a power-amp only... Running my GT-1B directly into the return. That worked surprisingly well.

With the exception of the Mesa M9 and SVT, it makes many other amps sound quite anemic, in side-by-side comparison.


I didn't know about this club thread :)
I love my RH450 that I bought used in the classifieds here. I don't care about the ratings frenzy that went on. It's plenty loud enough for my needs. For small to medium shows I use it with a 4 ohm Schroeder Mini 12+L. I was really surprised at how well this combo does, and the cab at just 19 pounds makes things so easy. I have a fold-up stand that slightly elevates and angles it. For bigger shows, I use it with my 4 ohm Bergantino AE410, and it's plenty for everything I need to do.

I don't use any of the programmable preset features, as I don't need them. I love the compression and the tube tone and the built in tuner. I played it through an Ampeg 810 that was backlined at a festival in early summer (unplugged the SVT 4PRO that they supplied), and it just killed.

I play fretless almost exclusively, and I'm able to get such a rich, warm mid-range through the eq, compression, and tubetone interplay ... It's pretty much perfect for me.
 
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