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New Cute Beyond (With 1/4'' output)

post #1 of 25
Thread Starter 
Hey Head-Fiers,

I recently bought the new Cute Beyond Headphone amplifier. I received it today.
It is very similar to the old model, and at the same time different.

It has a 1/4'' output (instead of the 1/8'' output). More handy for the headphones I use. Same volume pot, and different front plating (more formal, and more to my liking).

It has very similar specs as the older model, uses different op-amps, and has also the series and shunt switches. That is what you get to see when you read everything posted in the sites.

As I mentioned before it arrived today to my place. I bought it from firestone-audio European distributor. Good service and fast shipping. It even came with some candy (maybe because it is so "cute", who knows :P). As I have mentioned before I would have liked to spend less on an amp, tried the Pro Ject Head Box MKII, received a faulty unit and it was too small for what I wanted. Even so I plan to keep this amp for long, so the buy is more like an investment .

It is small. Nice form factor, feels good, and very lightweight. I come from the Little Dot I+, and the metal from the LD seems better quality, more heavy, whereas the Cute Beyond feels sturdy but with less density.

Both old and new models have the shunt or series volume control and the op-amps can be swapped. In the old model you can remove the upper plating and change the fuse or op-amps or volume switches.

On the new model it is easy to change the mode into shunt or series, but the op-amps seem to need more work.

I did the following pictures (sorry for the bad quality, had lighting problems, heat problems -too hot in my room- and had to close it fast to do some stuff). I will eventually upload more pictures once I have time. Even so you can check the inside picture here (what i could take due to the metal case and the lack of light). To open it you need to unscrew the volume pot from the potentiometer. Can be easily done.

ImageShack Gallery

The board layout has been changed. I think that as the ex-designer of Firestone audio left to start travagan's, they had to stop using the old design or they wanted to change it to a new one. (The 1/8'' output was something that set me back from getting the older version). It no longer has a fuse, it has more things directly soldered and the PCB board seems to be more difficult to reach than the previous model.

I have gotten in contact with the distributor to see if they can tell me exactly how am I supposed to change the op-amps without disassembling the entire amplifier. They gave me a free op-amp. Wanted to see how hard it would be to change it once I wanted to do so.

Apart from this "problems" I really like the form factor of the amplifier. I like the low and high gain switch, on and off switch and the volume pot feels really nice. In low gain I can listen to Grados at around 10.00 on normal listening levels. On 12.00 it would be a bit loud for me, still bearable, though.
At least i got what I was looking for, regarding the volume control.

I will also perform some RMAA measurements once I get the cables I need in order to perform it. I am interested in seeing if the FR remains flat with a 32 ohm load, and with different op-amps (the opa2604 stock and the free LM4562 i received) and different load.

If some people have buyed it as well you can contribute with your experience here.

Stay tuned for more
post #2 of 25
Thread Starter 
I forgot to add one more thing.

I don't know if the old Cute Beyond presented channel imbalance at low volumes, but it seems that the new version doesn't have that. (Tested on low gain)

Really like the looks of this little amp.
post #3 of 25
How are the new ones? Sound decent?
post #4 of 25
Thread Starter 
They sound great to me... They sound how some people would say "transparent, clear, not sibilant -tested with grado-, etc...

I prefer to leave the talking for another one. I will go for the RMAA measurements.
post #5 of 25
Thanks for the review. I placed an order a while ago but haven't completed the transaction because I'm stuck between the Beyond and the Curve. I'm learning towards the Beyond because of the Burr Brown chip but may still go with the Curve and get the Beyond later. I really don't want to have to dive too deep into all this audiophile stuff...my wallet is pretty shallow.

I also really like the slick new looks of the Firestone gear. I'm also having trouble deciding between black or silver.
post #6 of 25
Thread Starter 
Quote:
Originally Posted by Nighted View Post
Thanks for the review. I placed an order a while ago but haven't completed the transaction because I'm stuck between the Beyond and the Curve. I'm learning towards the Beyond because of the Burr Brown chip but may still go with the Curve and get the Beyond later. I really don't want to have to dive too deep into all this audiophile stuff...my wallet is pretty shallow.

I also really like the slick new looks of the Firestone gear. I'm also having trouble deciding between black or silver.
Technically speaking I would go with the Beyond (class A vs class B, not A/B)

I spent my time deciding between black or silver, think the silver looks great. The front plating looks in place, not as the black plating, that looks like an "add on".

Today I tried the amplifier with a 100 Ohm load (and a low sensitivity of 96dB), set gain on high and could listen to music with the volume knob at 11.00 a bit more. The volume control is definitely excellent. Feels good. Wanted to try the shunt volume with the LM4562 op-amp but seems it will take some time to open and change.

Now listening with the HF-2 and Cute Beyond. I think I prefer SS to hybrid (or tube).
post #7 of 25
They have a high current output right? I would think so since it's sold state. I wonder how it would fare with a HD600 or K701. So tempted right now.
post #8 of 25
Yes, I was leaning more towards the Beyond myself. After reading about distortions in class B in the upper peaks of the waveform, I'm a bit weary about them...although I doubt I could ever hear the difference, just knowing about it may be enough to hamper the experience.

The build quality of the Firestone gear is top notch. The only thing I didn't like is the bolts they use to fasten the case. I find they are a bit soft and easy to strip out the caps, so I replaced mine with more solid socket head type bolts that are designed for regular use. I wasn't cranking the bolts down or anything, but after messing around with the shunt switch a couple times I had one strip out on reassembly with hardly any torque.

post #9 of 25
Thread Starter 
Quote:
Originally Posted by Zombie_X View Post
They have a high current output right? I would think so since it's sold state. I wonder how it would fare with a HD600 or K701. So tempted right now.
Well well, I tried listening to the 100 Ohm 96dB headphones changing from low to high gain (20dB difference) and I was mistaken, the volume pot doesn't reach 11:00 (right there ir is quite loud), I am a low volume listener and at 9.00 is good. At 10.00 i presume would be the normal listening for other people.

It just has so much power to give (as many headphone amps). Even so what I am liking is that I can leave it turned on swap headphones without worrying (not as the hybrid ld I+ amp). With a switch I change from high to low gain, to drive my grados, and I have a dedicated volume control.

The HD600 are 300 ohm and 97dB sensitivity. No problem here. (Headphones just need few mW <50mW)

From the site:
Quote:
Sennheiser HD600 300ohm 120mW output 118dB SPL
The real one might vary, even so with 120mW you have enough to make your ears bleed.
post #10 of 25
Thread Starter 
Quote:
Originally Posted by Nighted View Post
Yes, I was leaning more towards the Beyond myself. After reading about distortions in class B in the upper peaks of the waveform, I'm a bit weary about them...although I doubt I could ever hear the difference, just knowing about it may be enough to hamper the experience.

The build quality of the Firestone gear is top notch. The only thing I didn't like is the bolts they use to fasten the case. I find they are a bit soft and easy to strip out the caps, so I replaced mine with more solid socket head type bolts that are designed for regular use. I wasn't cranking the bolts down or anything, but after messing around with the shunt switch a couple times I had one strip out on reassembly with hardly any torque.

http://img197.imageshack.us/img197/3404/joedmt.jpg
Well, the one you were talking about was the Cute Curve (which is class B). The Cute Beyond in class A (with its pro's and cons) and it is the one I have. It gets a bit hot due to that, way less than a tube or hybrid amp. Even so I'd appreciate if it were totally cold. I am afraid that can't be when current is flowing...

The screws from the cute beyond were good. I think they will last as far as you don't open the amplifier 3 or 4 times a day.

BTW, how did you find the shunt or series volume control? I haven't tried myself, and right now I am too lazy to open the amp again.
post #11 of 25
If you are are happy with the volume, I wouldn't bother with the series/shunt at all. One setting basically gives you control for the volume throughout the entire rotation of the knob, the other setting puts seemingly all of the wattage into bottom end of the volume knob's rotation, which can be a bit much at times and out of control.

I am aware the Beyond is class A. I'm also aware that the class B will run a lot cooler because of the more efficient power draw of the push/pull design. I certainly know far more than I wanted to know, but thanks to Firestone making 2 different amps, I couldn't stop myself from reading a bit more, as their info is pretty sparse.

Worst case scenario, I'll get them both and offload one as a gift in the future.
post #12 of 25
Thread Starter 
Quote:
Originally Posted by Nighted View Post
If you are are happy with the volume, I wouldn't bother with the series/shunt at all. One setting basically gives you control for the volume throughout the entire rotation of the knob, the other setting puts seemingly all of the wattage into bottom end of the volume knob's rotation, which can be a bit much at times and out of control.

I am aware the Beyond is class A. I'm also aware that the class B will run a lot cooler because of the more efficient power draw of the push/pull design. I certainly know far more than I wanted to know, but thanks to Firestone making 2 different amps, I couldn't stop myself from reading a bit more, as their info is pretty sparse.

Worst case scenario
, I'll get them both and offload one as a gift in the future.
Thnaks for your impressions. Yeah, I also dug a lot into different class amps in their performance. I already knew something but it is never enough

Your case doesn't seem to be so bad, does it? Hope you tell me how it goes.
post #13 of 25
Thread Starter 
Enjoying this little amp with my HPs. I really like swaping back and fort between HPs fast. Something I couldn't do with the hybrid LD I+.

Plus the "coldness and neutrality" of SS doesn't seem to be there. It is to be expected, though, if the FR stays flat (something I still need to measure with low impedance load).
post #14 of 25
Hey Bullseye, can you post some more pics soon? I'd like to get a better look at the outside shell. It looks like Firestone uses one solid piece now...similar to the Travagan's stuff.
post #15 of 25
Man. This forum is terrible. I really don't need a amp atm but this thing is adorable.

How does it compare to the LD I+? And some pictures would be lovely. Firestone has recently redesigned a bunch of their amps, if I'm not mistaken. I wonder if there is any improvement...
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