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Head-Fi Amp Guide -- Submissions - Page 7

post #91 of 113

Laconic HA-03 Tube Headamp (Russia)



Amp manufacturer: Audiokits (Russia)
Amp name/model: Laconic HA-03-60
In Production: Yes
List Price (In Russia): US$ 180
Amp type: two-stage Class A OTL tube headphone amp
Stock tubes: Military-grade N.O.S Svetlana tubes 2 x 6Н6П-Е 1 х 6Н3П-ЕВ
Frequency responce: 5..22000 kHz @ +/- 3dB
Inputs: 1 x RCA stereo input
Outputs: 1 x 1/4" stereo jack
Output impedance: 60 Ohms
Power supply: 220V AC
Dimensions: (WxHxD), mm: 120x140x115
Weight: 1.5 kg
post #92 of 113

Home Headphone Amp by JMT Audio

Amp manufacturer: JMT Audio
Amp name/model: Home Headphone Amp
In production? yes
List price (final list price if no longer in production): $200 bas
Type of amp: solid state
Crossfeed? Yes 2 level for $40 adder
Other processors? bass boost
Portable? NO
Power supply: wall wart A/C
Detachable power cord? yes
Number of headphone jacks: 1
Jack type: 1/4 locking
Inputs (line, etc., how many): 1 pair rca
Possible upgrades/upgrade path: sockets for op amp rolling, add outboard regulated PS
Housing material (plastic, steel, aluminum, etc.): aluminun
Size (dimensions): approx. 6.3" long x 4" wide x 2" tall
Weight : approx. 1lb.
post #93 of 113

Rega Ear (2005 Edition)

Amp manufacturer : REGA
Amp name/model : EAR
In production? (yes
List price $225
Type of amp (solid stat
Crossfeed? NO
Portable? NO
Power supply: AC wall wart, 24v, 300mA
Detachable power cord? yes
Number of headphone jacks: 1
Jack output impedance (per jack, if more than one): 32-600
Jack output (per jack, if more than one -- include @ #Ohms): 525mW@32ohm, 55mW@600ohm
Input Impedance: 24Kohm
Jack type: 1/4"
Inputs (line, etc., how many) : 1 pair rca
Other outputs (line, pre-amp, speaker, etc., how many); loop, 1 pair rca
Topology: Ti NE 5532 dual channel op amp, 2000uF caps at output
Possible upgrades/upgrade path (tubes, power supply, electronics, etc.): regulated outboard PS
Housing material (plastic, steel, aluminum, etc.): aluminum and plastic
Size (dimensions) : approx. 7.5" x 6" x 1.5"
Weight : approx 1lb.
post #94 of 113

Decware MLB




Manufacturer: Decware
Model: MLB
In production: No
List price: $862
Type of amp: Tube (SET)
Stock tubes: 6N1P, 6DJ8 or 6922's
Rect. Tubes: 5Y3GT, 5AR4, or 5U4
Crossfeed: No
Portable: No
Power supply: 120VAC
Detachable power cord: Yes, IEC
Headphone jacks: 1
Jack output impedance: < 10Ω
Jack output: 4V RMS (150mw) @32Ω
6V RMS (120mw) @250Ω
Jack type: 1/4" TRS
Inputs: 1 pair RCA
Other outputs: N/A
Housing material: Steel with gray powder coat finish
Size: 6"W x 11"D x 6.5" H
Weight: 13 lbs.
post #95 of 113
Laconic HA-03B1



Amp manufacturer: AUDIOKITS(Russia)
Amp name/model: Laconic HA-03B1
In Production: Yes
List Price (In Russia): US$ 239
Amp type: two-stage Class A OTL tube headphone amp
Stock tubes: Military-grade N.O.S Svetlana tubes 2 x 6Н6П-Е 1 х 6Н3П-ЕВ
Frequency responce: 5..22000 kHz @ +/- 3dB
Inputs: 1 x RCA stereo input+1 x RCA stereo input (-20 dB)
Outputs: 1 x 1/4" stereo jack
Output impedance: 60 Ohms
Power supply: 220V AC
Dimensions: (WxHxD), mm: 120x140x115
Weight: 2.5 kg


LACONIC HA-04AF (audiophile version)
Amp manufacturer: AUDIOKITS(Russia)
Amp name/model: Laconic HA-04AF
In Production: Yes
List Price (In Russia): US$ 318
Amp type: two-stage Class A OTL tube headphone amp
Stock tubes: Military-grade N.O.S Svetlana tubes 2 x 6Н30П-Е 1 х 6Н23П-ЕВ
Frequency responce: 5..45000 kHz @ +/- 0.5dB
Inputs: 1 x RCA stereo input+1 x RCA stereo input (-20 dB)
Outputs: 1 x 1/4" stereo jack
Output impedance: 24 Ohms
Power supply: 220V AC
Dimensions: (WxHxD), mm: 130x130x145
Weight: 2.5 kg
post #96 of 113

The tubes amplifier for portable devices and a computer



Amp manufacturer: AUDIOKITS
The dealer in the USA: EddieCurrent (www.eddiecurrent.com cuthus@charter.net)
Amp name/model: Lunch Box
In Production: Yes
List Price (In USA): US$ 160
Amp type: two-stage Class A OTL tube headphone amp
Tubes: tubes 2 x 6Н24П-Е 1 х 6Н3П-ЕВ
Frequency responce: 5..43000 kHz @ +/- 3dB
Inputs: 1 x RCA stereo input
Outputs: 1 x 1/4" stereo jack NEUTRIK
Output impedance: 35 Ohms (For headphones with resistance from 150 om)
Power supply: 220V/50Hz or 110V/60Hz
Dimensions: (WxHxD), mm: 140x65x120
Weight: 0.8 kg
post #97 of 113

Decware CSP2




Manufacturer: Decware
Model: CSP2
In production: Yes
List price: $695 Introductory, $1349 MSRP
Type of amp: Tube (SET OTL Class A1)
Stock tubes: 6N1P, 6DJ8 or 6922's
Rect. Tubes: 5Y3GT
Crossfeed: No
Portable: No
Power supply: 120VAC
Detachable power cord: Yes, IEC
Headphone jacks: 1
Jack output impedance: < 60Ω
Jack type: 1/4" TRS
Inputs: 2 pair RCA
Other outputs: 1 pair RCA pre-amp outs
Housing material: Solid Walnut sides with 2mm thick T6 Aluminum top
Size: 7.25" W x 14.75" D x 8.5" H
Weight: 13 lbs.
post #98 of 113

Little Dot II+


Amp manufacturer
Amp name/model: Little Dot II+
In production? yes
List price: 150USD
Type of amp: tube
Stock tubes: Two Mullard EF92 drivers, Two Chinese/Soviet 4P1S for power
Crossfeed? no
Other processors? no
Portable? no
Power supply: AC
Detachable power cord? yes
Number of headphone jacks: One
Jack output impedance: no idea
Jack output: no idea 50-92mw?
Jack type: 1/4"
Inputs: Line in RCA , Line out RCA
Other outputs: none
Speaker output rating: none
Frequency response: 10Hz to 35KHz (-3db)
Distortion: <=1% (50mW, 300ohm)
Possible upgrades/upgrade path: driver tubes possible, power tubes is unlikely
Housing material: steel?
Size: 200(L) *120(W) *105(D) mm(before tubes installed )
Weight: 2.5kg
post #99 of 113

Little Dot III+ Amp



Amp manufacturer: Little-Tube.com
Amp name/model: Little Dot III+
In production? yes
List price: 349 USD
Type of amp: tube, headphone/speaker, Class-A biased, directly heated, swichable triode/pentode
Stock tubes: driver 2 Mullard (or Brimar) EF91, power 2 Chinese/Soviet 4P1S
Crossfeed? no
Other processors? no
Portable? no
Power supply: AC
Detachable power cord? yes
Number of headphone jacks: one
Jack output impedance: auto-sensing 32/60/120/300/600 Ohm
Jack output: triode mode 1 W/channel @120 Ohm, pentode mode 3.5 W/channel @8 Ohm
Jack type: 1/4"
Inputs: 1 Line in RCA
Other outputs: 1 preamp Line out RCA, 1 set of speaker binding posts
Speaker output rating: 3.5 W/channel @8 Ohm
Frequency response: 10Hz to 35KHz (-3db)
Distortion: <=1% (50mW, 300ohm)
Possible upgrades/upgrade path: driver tube change for equivalent is possible, power tube change is unlikely: 4pi1pi (4n1n) type is hard to find
Housing material: Z11 silicon steel plating, real wood front, aluminium volume control
Size: Main unit 230mm (W) X 265mm (D) (300mm including front controls & back connectors) X 132mm (H, including feet), Power supply 104mm (W) X 144mm (D) X 68mm (H, including feet)
Weight: Main unit 4.9 Kg, Power supply 1.7 Kg

Other specs
=========
Website:
www.little-tube.com
Components used: ALPS RK-27 volume pot, hand-matched German WIMA+ERO coupling capacitors, Vishay-Dale resistors, and Nichicon electrolytic capacitors.











post #100 of 113

Xiang Sheng 708B







Amp manufacturer: Xiang Sheng
Amp name/model: 708B
In production: Yes
List price: $230 from The Pacific Valve & Electric Company
Type of amp: Tube, White Cathode Follower
Stock tubes: 6Z4 mini rectifier, 6N3 gain, two 6922 output, 6N1 in front window for decoration
Crossfeed: No
Other processors: No
Portable? No
Power supply: 110VAC
Detachable power cord: Yes, IEC
Number of headphone jacks: 1
Jack output impedance: 32-600Ω
Jack type: 1/4" TRS
Inputs: 1 pair RCA
Other outputs: 1 pair RCA pre-amp outs
Housing material: Painted steel chassis with 8mm aluminum front panel
Size: 10-1/8"D x 7"W x 3-3/8"H
Weight: 10 lbs.

Lots of additional info on Head-Fi here and here.
post #101 of 113
Quote:
Originally Posted by Edwood View Post
Pictures of amp:










Amp manufacturer Grace Design
Amp name/model Model 901
In production? (yes/no) Yes
List price (final list price if no longer in production) $1495.00 USD
Current "street" price (used only if no longer in production) $1199.00 - $1395.00 USD
Type of amp (solid state/tube/hybrid) Solid State, Bi-Polar Class A Output, Class B Input
Stock tubes (only if tubed) n/a
Crossfeed? (yes/no, how many levels) No
Other processors? (yes/no, type, details) Built in DAC, Crystal CS43122, 24bit 32k to 96K
Portable? (yes/no) No
Power supply (batteries/AC) AC, Linear Regulated, Toroidal, 115VAC 0.16A, 230VAC 0.08A
Detachable power cord? (only if AC, yes/no) Yes, IEC
Number of headphone jacks 2
Jack output impedance (per jack, if more than one) 1Ohm
Jack output (per jack, if more than one -- include @ #Ohms)
Jack type (mini, 1/4", per jack if more than one) 1/4"
Inputs (line, etc., how many) 40K Ohms balanced XLR, 20K Ohms unbalanced RCA, coaxial SPDIF, optical, and AES3
Other outputs (line, pre-amp, speaker, etc., how many) n/a
Speaker output rating (only if speaker out -- include @ #Ohms) n/a
Possible upgrades/upgrade path (tubes, power supply, electronics, etc.) internal DAC board
Housing material (plastic, steel, aluminum, etc.) Machined Aluminum and Clear coated Front Beze, Powder Coated Folded Steel Chassis
Size (dimensions) 8.5" x 8.5" x 1.7"
Weight 5.8 lbs
Grace Design M902.

Pretty much same specs except:
Digital in also has USB option.
Two headphone jacks and one unbal out at +20db gain.
DAC can sample up to 192khz with S-Lock for low jitter.
Still in production - MSRP is $1695 USD
post #102 of 113

β22 amplifier


(AMB prototype shown, actual appearances vary depending on case used)

DIY design developed by AMB.
Inquire about having one prebuilt by MisterX or thrice.
Assembled and tested circuit board modules are also available from SFT.

-Amp name/model: β22 ("beta 22")
-In production? Yes
-List price: DIY: varies; Prebuilt: contact builders for pricing info
-Current "street" price: n/a
-Type of amp: Solid state class A, all-discrete fully complementary, JFET input stage, BJT voltage amplification stage, high current MOSFET output stage. All stages dynamically cascoded. 2-channel passive ground, 3-channel active ground or 4-channel fully balanced options.
-Stock tubes: n/a
-Crossfeed: None
-Other processors: None
-Portable? No
-Power supply: Companion σ22 ("sigma 22") all-discrete, complementary dual rail tracking regulated PSU, ±24V to ±30VDC.
-Detachable power cord? Yes
-Number of headphone jacks: 1 or more
-Jack output impedance (per jack, if more than one): < 0.01Ω
-Jack output (per jack, if more than one -- include @ #Ohms) n/a
-Jack type: 1/4" phone (unbalanced) or dual XLR (balanced)
-Inputs: Line in (unbalanced RCA or balanced XLR)
-Other outputs: Speaker output (optional)
-Output power (unbalanced): 18Wrms/ch into 8Ω, 5.6Wrms/ch into 32Ω, 0.75Wrms/ch into 300Ω
-Output power (balanced): >50Wrms/ch into 8Ω
-Possible upgrades/upgrade path: See websites
-Input Sensitivity: n/a
-Maximum Gain: 8 (20.8db) default, can be built to other gain settings
-Input Impedance: 47.6KΩ (depends on volume pot/attenuator used)
-Output Impedance: < 0.01Ω 20Hz - 20KHz
-Total Harmonic Distortion: 0.0010% (RMAA)
-Intermodulation Distortion: 0.0072% (RMAA)
-Frequency Response: 0Hz - 2.5MHz, +0, -3dB
-Slew rate: 198V/µS @ 43Vp-p output, 100KHz square wave
-Rise time: 175nS 10%-90%, 100KHz square wave
-Signal to Noise Ratio: 90dBA (RMAA)
-Stereo Crosstalk: -86dB (RMAA)
-Housing material: Various choices
-Size (dimensions): Various choices
-Weight: n/a
post #103 of 113
picture of amp:


www.paradoxaudio.prv.pl

DIY design based on X-cans MF amplifier

Amp manufacturer: Paradox Audio (Poland)
Amp name/model: Standard, SE, Extrema
In production: yes
List price: 150 EUR - 1000 EUR
Type of amp: integrated hybrid headphone amplifier
Crossfeed:
Other processors: no
Portable: no
Power supply: internal (220-240V)
Detachable power cord? yes
Number of headphone jacks: 2
Jack output impedance: 12~600 ohms
Jack output: 1,5 watts
Inputs: 1/2
Other outputs: no/tape loop
Upgrades: STD to SE to Extrema
Housing material: Steel chassis, aluminum front panel and knobs
Size: 325 x 100 x 345 mm (W x H x D)
Weight: 7 kg
post #104 of 113
Sorry if this is the wrong place, thought this seemed like an appropriate thread..

Would it make sense for someone to compile another list of amp recommendations for some of the most common headphones? There are some usual recommendations that are mentioned in almost every post asking for an amp for a certain headphone. There are also a lot of threads asking for amp suggestions for headphones many here are very familiar with. The list could be something like this:

Headphone

Recommended tube
Amp 1

Recommended SS
Amp2
post #105 of 113
Quote:
Originally Posted by RubberDuk View Post
Sorry if this is the wrong place, thought this seemed like an appropriate thread..

Would it make sense for someone to compile another list of amp recommendations for some of the most common headphones? There are some usual recommendations that are mentioned in almost every post asking for an amp for a certain headphone. There are also a lot of threads asking for amp suggestions for headphones many here are very familiar with. The list could be something like this:

Headphone

Recommended tube
Amp 1

Recommended SS
Amp2
Great idea! I was thinking of this the other day. Someone should do it... BUT WHO? O_O
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