[money4me247]

surprised that no one has posted on this item yet. Stoner Acoustic's released released the Ruby High-Fidelity Portable Amplifier for usage with headphones and IEMs.
 

 

Quote:

A cube sized miniature high fidelity headphone/IEM amplifier based on the high DNR Sabre9601, armed with a high precision stepped attenuator, linear battery charger and ultra-low noise LDO, simply for the serious audiophiles.

 



 
SPECIFICATIONS

Attenuator : 21 High Precision Logarithmic Steps
Gain : 3dB
Output Impedance : <2.5ohm
Max Output Rating :
Input 1.60Vrms : Continuous Stereo Output 2.20Vrms into 10kohm 
Input 1.25Vrms : Continuous Stereo Output 1.75Vrms into 100ohm (30mW/Ch)
Input 1.05Vrms : Continuous Stereo Output 1.45Vrms into 50ohm (40mW/Ch)
Input 0.88Vrms : Continuous Stereo Output 1.20Vrms into 33ohm (40mW/Ch)
Input 0.78Vrms : Continuous Stereo Output 1.00Vrms into 25ohm (40mW/Ch)
Size : 51(D) x 32(W) x 32(H)
Weight : 50g
Battery life : >12 hours at normal listening level
Charge : Standard Micro-USB 5V
Warranty : 1 year (no warranty for accessories) 
Package Included : 1 x Ruby, 1 x Bag, 1 x Micro USB, 1 x mini-jack 3.5mm to 3.5mm  cable. 
Price : USD99 / RM330 Shipping Fees : USD6(Registered Mail to worldwide) / RM10(Poslaju within Malaysia)

 


 
source link: http://stoneracoustics.blogspot.com/2015/05/ruby-high-fidelity-amplifier.html
 
Please post discussion and impressions here!

 

[Ultrainferno]

We have been posting about it in other threads but thanks for making this dedicated thread!
Mine's on it's way. I received the tracking number today. Can't wait.

 

[qafro]

Can it run DT770 250 ohm headphones?

 

[BaTou069]

How am I supposed to stack this?

 

[Ultrainferno]

How am I supposed to stack this?

 
Velcro

 

[narvarr]

Where can I purchase one of these little gems?

 

[money4me247]

you can either contact stoner acoustics through facebook here: https://www.facebook.com/StonerAcoustics or via e-mail here: stoneracoustics@gmail.com

 

[jmwaite]

Mine was shipped on 5/11. Neat looking little unit. I currently have an UD 110 mkII and a UD 120. Nice products.

 

[money4me247]

Mine was shipped on 5/11. Neat looking little unit. I currently have an UD 110 mkII and a UD 120. Nice products.

looking forward to a direct comparison of all three! I really liked my ud100v2 when I had it. was about to get the new ud120, but holding off as there seems to be quite a few new products coming out of Stoner Acoustics. wondering how this new product compares.

 

[Ultrainferno]

Mine just arrived. so cute.
 

 
Pretty good SQ as well. Nice.

 

[FlySweep]

  Mine just arrived. so cute.
 

 
Pretty good SQ as well. Nice.

 
Very cool.. looking fwd to more impressions on the SQ (what DAC will you be using?).. thanks!

 

[jmwaite]

Mine just arrived as well. The cute factor is high with this one. Sound is very good, too. I will wait to review this unit until I get some hours on it. Caps need to charge and form. I have compared the Ruby to a RS Shadow and there are some subtle differences but it would be unfair to make judgement now. Associated equipment includes: Mac Book Pro--USB out to a UD-120. The UD 120 is powered by a 12v, 15ah SLA battery supplying a 5v power supply card for the UD-120. This stable DC power for the DAC does very nice things for the overall sound. Output then goes to the Ruby. I'm using Heir Audio 4ai IEMs. Toxic Cables Silver Poison cables round out the setup. Will try to supply pictures soon.

 

[Ultrainferno]

Just a Ruby picture

 

 

[osiris1]

  Just a Ruby picture

 

smaller than the knob on the violectric... hope to see reviews on this soon.

 

[qafro]

  Mine just arrived as well. The cute factor is high with this one. Sound is very good, too. I will wait to review this unit until I get some hours on it. Caps need to charge and form. I have compared the Ruby to a RS Shadow and there are some subtle differences but it would be unfair to make judgement now. Associated equipment includes: Mac Book Pro--USB out to a UD-120. The UD 120 is powered by a 12v, 15ah SLA battery supplying a 5v power supply card for the UD-120. This stable DC power for the DAC does very nice things for the overall sound. Output then goes to the Ruby. I'm using Heir Audio 4ai IEMs. Toxic Cables Silver Poison cables round out the setup. Will try to supply pictures soon.

' The UD 120 is powered by a 12v, 15ah SLA battery supplying a 5v power supply card for the UD-120. This stable DC power for the DAC does very nice things for the overall sound.'
With reference to the above quote - Please let me how you set it up SLA battery supplying a 5v power supply card  or brought it?