[greenhorn]

Yes, I know that infos on this amp has lready been posted, but I thought a new photo & new infos won't harm.

HP4

Information given by a distributor:

"Tim de Paravicini has long had a worldwide reputation for valve
preamplifiers and
power amplifiers. Now he has applied his expertise to produce what is
arguably the
world’s finest headphone amplifier aimed at the highest quality dynamic
headphones.

The HP4 uses 6SL7 valves, properly matched to the load through de Paravicini
’s
renowned transformers, to deliver nearly 1W of high quality, low distortion
power into
high or low impedance headphones. The output circuit configuration uses de
Paravicini’s ‘Enhanced Triode Mode’, as employed in the highly successful
V20 and
859 integrated amplifiers, while the input is also transformer coupled,
giving the
flexibility to accept balanced or unbalanced signals from the preamplifier.

For the greatest user convenience the HP4 has its own volume control, while
input
signals can be independently switched through to the power amplifier for
headphone
and/or loudspeaker listening. As with all EAR products, reliability is
paramount and
valve life is in excess of 10,000 hours"

Price asked by the distributor: 2400 euros.

 

[greenhorn]

Well, nobody did it, so I will post a photo of this amp:

 

[mkl]

AMITY HP4



Amp manufacturer: Amity
Amp name/model: HP4
In production? (yes/no): yes
List price (final list price if no longer in production) :450€
Type of amp (solid state/tube/hybrid) : solid state
Crossfeed? (yes/no, how many levels) : no
Other processors? (yes/no, type, details) : no
Portable? (yes/no) : no
Power supply (batteries/AC): AC
Detachable power cord? (only if AC, yes/no) : yes
Number of headphone jacks : 1
Jack type (mini, 1/4", per jack if more than one) : 6.35mm (1/4")
Inputs (line, etc., how many) : 1 line
Other outputs (line, pre-amp, speaker, etc., how many) : none
Housing material (plastic, steel, aluminum, etc.) : aluminium
Size (dimensions) :W*H*D: 110*62*200 (4-5/16” * 2-7/16” * 7-14/16” )
Weight : 1kg

 

[elnero]

Amp manufacturer: NVA
Amp name/model: AP10H
In production? Yes
List price: $329 CDN kit, $429 CDN Assembled
Current "street" price (used only if no longer in production): N/A
Type of amp: Solid State
Stock tubes: N/A
Crossfeed?: No
Other processors?: No
Portable?: No (Luggable, Maybe)
Power supply: AC
Detachable power cord?: ??
Number of headphone jacks: 1
Jack impedance (per jack, if more than one): ??
Jack output (per jack, if more than one -- include @ #Ohms): ??
Jack type: 1/4"
Inputs: 1
Other outputs: N/A
Speaker output rating: N/A
Possible upgrades/upgrade path: ??
Housing material (plastic, steel, aluminum, etc.): wood, anodized aluminum and plexiglass
Size (dimensions): 250 x 75 x 200 mm
Weight: ??

Main NVA website http://nva.sclnz.com/ and the amps can be bought through http://peakaudio.ns.ca/

 

[TimSchirmer]

Amp manufacturer? Mysterious Japanese Company
Amp name/model? Valve X
In production? Yes
List price? 450$ by special request from AudioCubes

Type of amp? Tube
Stock tubes 12AU7's
Crossfeed? no
Other processors? no
Portable? no
Power supply? AC
Detachable power cord? no
Number of headphone jacks? 1
Jack impedance? ?????
Jack output? ?????
Jack type? 1/4
Inputs? 1
Other outputs? none
Housing material? Aluminum
Size? ?????

 

[SumB]

Amp manufacturer: Space-Tech Laboratory
Amp name/model: SE-6BQ5
In production? (yes/no): Yes
List price: $580 US
Type of amp: Class A, single-ended tube
Stock tubes: 2 x 12AX7 + 2 x 6BQ5
Crossfeed?: No
Other processors?: No
Portable?: No
Power supply: AC
Detachable power cord?: Yes
Number of headphone jacks: 1
Jack output: 6WRMS
Jack impedance: ???
Jack type: 1/4 inch
Inputs: One pair gold plated RCA
Other outputs: Bi-wireable speaker binding posts
Speaker output rating: 6Wrms into 8 ohm
Housing material: Choice of MDF or aluminum in Gold/Black/Metallic. Mirror steel, black piano, and solid-oak available at additional cost
Size: ???
Weight : ???

Amp manufacturer: Space-Tech Laboratory
Amp name/model: SE-6AS7G
In production? (yes/no): Yes
List price: $580 US standard version/$780 for special enhanced version
Type of amp: Class A, single-ended tube
Stock tubes: 2 x 6SN7 + 2 x 6AS7G
Crossfeed?: No
Other processors?: No
Portable?: No
Power supply: AC
Detachable power cord?: Yes
Number of headphone jacks: 1
Jack output: 1WRMS
Jack impedance: ???
Jack type: 1/4 inch
Inputs: One pair gold plated RCA
Other outputs: Bi-wireable speaker binding posts. Preamp out on SEV model
Speaker output rating: 1Wrms into 8 ohm
Possible upgrades/upgrade path: SEV version adds high pass filter switch to switch between full range and tweeter only drive, a preamp out, and a pre/power amp switch
Housing material: Choice of MDF or aluminum in Gold/Black/Metallic. Mirror steel, black piano, and solid-oak available at additional cost
Size: ???
Weight: ???

Amp manufacturer: Fuchs Audio
Amp name/model: Zeus
In production? (yes/no): Yes
List price: $1995
Type of amp: All tube SET OTL
Stock tubes: 6x 6EM7
Crossfeed?: No
Other processors?: No
Portable?: No
Power supply: AC
Detachable power cord?: Yes
Number of headphone jacks: 1
Jack impedance: 20 ohm
Jack output: 1WRMS
Jack type: 1/4 inch
Inputs: One pair gold plated RCA
Other outputs: No
Housing material: Choice of Oak, Walnut, Mahogany, or Cherry. Other woods and/or metal finishes are available at additional cost
Size:: ???
Weight:???

 

[halcyon]

Maker: Talisman Audio
Model: T-3H
In production: YES
List price: c. 600 Euros ~ $600 USD
Current "street" price:
Type of amp: pure class A, dual mono, solid state amp out of discrete componets
Crossfeed: NO
Other processors: NO
Portable: NO
Power supply: AC
Detachable power cord: YES (CEI)
Number of headphone jacks: 1
Jack impedance: 2 Ohms (measured at 1 kHz)
Jack output: 150 mW @ 300 Ohms, 300 mW @ 150 Ohms
Jack type Inputs: 2xRCA (single stereo input, line level)
Other outputs:: 2xRCA (single stereo output, line level)
Speaker output rating: NONE
Possible upgrades/upgrade path: NONE KNOWN
Housing material: Metal (alloy unknown)
Size (dimensions): 140 x 60 x 210 mm
Weight: 500 g
Other: More information at http://www.talisman-audio.com/englis...duits_T-3H.htm

 

[ddriveman]

Maker: Opera Audio
Model: Cyber 30/Signature
In production: YES
List price: US$ 506 ~ 635
Current "street" price:
Type of amp: Class A Single Ended Triode (SET), Zero Feedback
Crossfeed: NO
Other processors: NO
Portable: NO
Power supply: AC
Detachable power cord: YES (CEI)
Number of headphone jacks: 1
Jack impedance:
Jack output:
Jack type Inputs: 4xRCA (dual stereo input, line level)
Other outputs:: Speaker Output Terminals (4/8 ohm selectable)
Speaker output rating: 3.5W X 2
Possible upgrades/upgrade path: Signature version. Upgraded Caps and attenuator
Housing material: Steel, Aluminium and Wodd
Size (dimensions): 320 ( L ) x 260 ( W ) x 150( H ) mm
Weight: 15 KG
Other: VACUUM TUBE: 2A3 x 2,ECC83 x1
More information at : http://www.operaudio.com/Html/Opera-Products.

 

[robo7]

manufacturer: RAY-SAMUELS

Model : Emmeline HR-2
In production? yes
List price : 875$
Type of amp : solid state (AD797/OPA627 +? )
Power supply : Separate Box 25VA
Number of headphone jacks : 1
output impedance :
Jack type : 1/4"
Inputs : 1 / 50kohm
Housing material : metal
Size (dimensions): 6 x 4.5 x 1.5

Review by Mark L
Review by Tuberoller

 

[vkx86]

Amp manufacturer: Aqua, Aqua audio
Amp name/model: Head
In production? yes
List price: $350
Type of amp: solid state
Crossfeed? no
Other processors? no
Portable? no
Power supply: AC transformer (2 x 18V/1000mA included) (mains 220 V or 110 V upon demand)
Detachable power cord: no
Number of headphone jacks: 1
Jack impedance: 20 - 1000 ohm
Jack output: 70 mW into 240ohm load
Signal to noise: >89 dB
THD: 0.0015% @ 1 kHz
Frequency response: 20 Hz - 100 kHz @ -3db (0,1dB tolerance)
Jack type: 3-pole 6,3 mm
Inputs: 2 RCA
Other outputs: no
Possible upgrades/upgrade path: output power (for low efficiency headphones)
Housing material: Aluminium
Size (dimensions): 105 mm x 200 mm x 65 mm
Weight: 560 grams (without PS)

 

[timoteus]

http://www.nutshellhifi.com/gary/

Amp manufacturer: Gary Dahl
Amp name/model: Espressivo
In production: Not currently
List price: In excess of $1500 US in parts alone.
Type of amp: Tubes
Stock tubes: 6CJ3 x 2, EL84 x 2, 3A/167M x 2 equivalent to Western Electric 437A
Crossfeed: No
Other processors: No
Portable: No
Power supply: AC
Detachable power cord: Yes
Number of headphone jacks: 2
Jack output impedance: Selectable 4, 10, 50, 200, or 500 Ohm
Jack type: 1 mini and 1 1/4" changed to 2 1/4"
Inputs: 1
Other outputs (line, pre-amp, speaker, etc., how many)
Speaker output rating (only if speaker out -- include @ #Ohms)
Possible upgrades/upgrade path (tubes, power supply, electronics, etc.)
Housing material: Powdercoated steel Hammond
Size: Chassis dimensions of 17"D x 10"W x 3"D
Weight: Very heavy, lots of iron! The power transformer alone weighs in at 11 lbs.

 

[vkx86]

Amp manufacturer: Skorpion
Price: $750
Inputs: One RCA pair (rear)
Outputs: One RCA pair (rear), two standard 0.25" (1/4") stereo headphone (front)
Control: Front on/off switch and large volume control
Frequency Response: 5Hz to 70kHz (+0/-3dB)
Tubes: preamp - 6AQ8/ECC85 for pre-amplification, 6080 for amplification
Operation: "Class A", OTL (Output Transformer Less)
Input Impedance: 100 kohms
Input Sensitivity: 550 mV
Output Power: 300 mW
Output Impedance: 40 ohm
Load Resistance: 30 to 600 ohm
Signal To Noise: 86dB
THD+N: <0.7% @ 100 mW, <1.5% @ 200 mW
Power Consumption: 60 Watts
Absolute Phase: Reversed
Weight: 4 Kg.
Dimensions:, 25 x 22 x 19 (HxWxD in cm)

Review

 

[jadde]

Amp manufacturer: Harmony Design
Amp name/model: EAR90
In production? yes
List price: $400??
Type of amp: solid state
Crossfeed? no
Other processors? no
Portable? no
Detachable power cord: yes
Number of headphone jacks: 2
Jack type: 3-pole 6,3 mm
Inputs: 1 RCA
Other outputs: no
Housing material: Aluminium
Size (dimensions): 200 mm x 50 mm

 

[Sovkiller]

[size=x-small]Silhouette Perreaux SHX-1 (AKA "Dinky Knob")....New addition to the Perreaux line of goodies, this is the current production.[/size]


Front

Back

Internal (****)

-Amp manufacturer: Perreaux Industries Limited.
-Amp name/model: Silhouette SHX-1 Headphone amp
-In production? Yes
-List price: $349.99
-Current "street" price: still in production (the introductory price was $299.95)
-Type of amp: all solid state (discrete design full class A operation)
-Stock tubes: N/A
-Crossfeed: N/A
-Other processors: N/A
-Portable: N/A
-Power supply: AC (internal, toroidal transformer with 22,000µF of Smoothing Capacitance)
-Detachable power cord: Yes
-Number of headphone jacks: 2 at the front
-Input impedance: 50Kohms
-Rated Power Output (per channel): 2.2Wrms @ 32ohms, 1.1Wrms @ 64ohms, 235mWrms @ 300ohms
-Voltage swing: 18.8Vp-p
-Jack type: 2 x 1/4"
-Inputs: line in (two unbalanced RCA)
-Other outputs: line out (two unbalanced RCA with fixed output, not pre-out)
-Speaker output rating: N/A
-Possible upgrades/upgrade path: It was already upgraded to Rev 0.5 on dec 2003, otherwise DIY mods.
-Input Sensitivity: 1.5Vrms
-Maximum Gain: 13.4dB
-Input Impedance: 50kohms
-Output Impedance: Stable down to 8ohms
-Total Harmonic Distortion (THD+N), Typically: 0.001%, @ 1kHz into 64omhs, 20Hz to 20kHz: <0.005%
-Frequency Response: 6Hz-56kHz, ±0.25dB
-Signal to Noise Ratio Rated Output (unweighted): >95dB
-Dynamic headroom: >3.0db
-Housing material: steel case, heavy gauge engraved aluminum front panel and knob.
-Size (dimensions): Width: 215mm (8.5"), Height: 57mm (2.2"), Depth: 170mm (6.7")
-Weight: 1.4kg (3.1lb)

Notes:

Optimal Circuit Layout for Increased Channel Separation and Noise Floor and Enhanced Audio Design Featuring Highest Quality PCB and Minimal Internal Wiring.
All the testing curves of the main electronic parameters are included along with the manual, also includes a generous extended 3 years warranty....
This is the old Rev 0.3, the current production is the Rev 0.5, which supposedly outperform this one, with some mods made to improve the circuit....

 

[HighwayStar]

-Amp manufacturer: JMT Audio www.jmtaudio.com (Note: available from other builders as well...Voodoochile and Tangent to name a couple)
-Amp name/model: PPA (PPL's Portable Amplifier, designed by PPL, Morsel, Tangent, and KurtW).
-In production? Yes
-List price: Contact JMT
-Current "street" price: n/a
-Type of amp: solid state, Differential output topology, Jung multiloop topology, Class A operation, AD8610 or OPA627 based.
-Stock tubes: N/A
-Crossfeed: Modified Linkwitz optional
-Other processors: Bass boost, optional
-Portable? Yes
-Power supply: Elpac 24V wall wart for AC operation (#WM080-1950-760)
-Detachable power cord? Yes
-Number of headphone jacks: 1
-Jack output impedance (per jack, if more than one) n/a
-Jack output (per jack, if more than one -- include @ #Ohms) n/a
-Jack type: 1 x 1/4"
-Inputs: line in (two unbalanced RCA)
-Other outputs: none
-Speaker output rating: n/a
-Possible upgrades/upgrade path: Crossfeed & bass boost
-Input Sensitivity: n/a
-Maximum Gain: 11 (21db)
-Input Impedance: n/a
-Output Impedance: n/a
-Total Harmonic Distortion n/a
-Frequency Response: n/a
-Signal to Noise Ratio Rated Output (unweighted): n/a
-Dynamic headroom: n/a
-Housing material: Hammond 1455N1601 or Lansing MicroPak E.
-Size (dimensions): Width: 107mm (4.2"), Height: 57mm (2.4"), Depth: 193mm (7.6")
-Weight: What's a henway ?