For your ears only

You can buy custom molded in-ear monitors.
You go to an audiologist.
He makes an impression of your ear.
Send it to the factory.
Wait until they ship your custom-fit IEM.
Oh yeah, you have to pay a substantial amount of money too.


Why not rolling your own!


Take a pair of Sonomax Eers headphones.
Put them in your ears while attached to the thingy below.

Pull the trigger and don’t move your jaw for 5 minutes and you have your custom mold.
Source: eers™ custom fit earphones

Linnenberg u:c:a

Pre-amp with USB and SPDIF inputs and RCA and headphone out.

USB input uses the M2tech OEM circuit (Win/Mac) but a new receiver using the XMOS XS1-L1 is planned allowing for full USB Audio Class 2 support (Win, OSX, Linux).

DAC: TI/Burr Brown PCM1794A with TI/BB4192 sample-rate converter.
Upsampling to 192kHz, regardless of input rate. Master clock oscillator with 3ps periodic jitter. Passive I/U conversation with 0.1% precision resistors, zero feedback.

Headphones amplifier: Full discrete construction. NO OPAMPS. NO CHIPS. Volume control with selected blue Alps attenuator. 6.35mm phone jack output. 1000mW continuous sine power output. 1Ohm output impedance. Suitable for 32 – 600 Ohms cans.

Sampling frequencies:	44.1, 48, 88.2, 96, 176.4, 192kHz, (plus 32kHz S/PDIF)
Resolution:	Up to 32bit, (24bit S/PDIF)
Frequency response:	1Hz - 24kHz +0.1dB -0.5dB
Distortion and noise:	<0.01% 10Hz - 20kHz @ -10dB
Output level:	4V rms
Output power:	2 x 500mW continous @ 32 Ohms
Output impedance:	1 Ohm
Mains voltage:	115V, 230V factory set
Dimensions (H x W x D):	55 x 165 x 224 mm

Website Linnenberg
Price: €1.190

Anedio D2 DAC

Pre-amp / DAC with various digital inputs and headphone out.

Asynchronous USB using the XMOS receiver, Thesycon driver for Win (USB audio class 2).

Inputs:
USB: 24 bits, 44.1K, 48K, 88.2K, 96K, 176.4K, 192KHz
SPDIF 75-ohm BNC + RCA: 24 bits, 44.1K, 48K, 88.2K, 96K, 176.4K, 192KHz
SPDIF 75-ohm RCA: 24 bits, 44.1K, 48K, 88.2K, 96K, 176.4K, 192KHz
Tosllink Optical: 24 bits, 44.1K, 48K, 88.2K, 96KHz

Outputs:
RCA and XLR
Headphone

Price:  US$1470
Website

ATOLL DAC200

Pre-amp/DAC with various digital inputs and headphone out

Inputs

• 1 AES/EBU
• 2 SPDIF coaxi
• 3 SPDIF optical
• 1 asynchronous USB : 24bits/192kHz (XMOS, driver for Win)
• 1 wireless dongle

Outputs:

• 1 coax
• 1 optical
• 1 RCA 
• 1 XLR 
• 1 headphone

DAC: BURR BROWN PCM1792 (24 bits/192 kHz)

Price: €1500

Website

ExaSound E18

DAC with volume control and headphone out.

• ES9018 SABRE32 Reference DAC
• 8 channels at up to 32bit/384kHz (USB only)
• Asynchronous USB interface 
• Ultra low jitter 
• Galvanic isolation 
• Bit-perfect ASIO Driver Reference-class specifications
• Automatic sampling rate switching 
• Plays DXD 352.8 kHz 

Price: $2000
Website

Wyred4Sound mINT

Mini-Integrated amplifier

Inputs
2 analog
S/PDIF 24 bit 192kHz
Asynchronous USB 24 bit 96kHz

DAC: ESS

Output
Pre-amp out
Headphone out
ICEpower amp 100 wpc in 8 Ohm

US$ 1,499.00

Website

Centrance DACmini PX

DAC 24 bit
Headphone out: 1.5W (headphone output, total), drives 32...600 Ohm headphones
Speaker out: 50W (speaker output, total), drives 4...8 Ohm speakers 

Line out

Inputs

USB: 24 /96 adaptive mode 

S/PDIF: Up to 192 kHz Coax

Toslink

Price: $1475.00

Website: Centrance

ASUS Xonar Essence One USB DAC and Headphone Amp

ASUS, the computer giant, launched a digital audio line under trade name Xonar.  Their first product, the Essence One, is a headphone amp / DAC with USB and SPDIF inputs.  Utilizing a PCM1795 32-bit DAC chip which upsamples everything to 384kHz.  RCA and balance XLR outputs.

credit my-hiend.com 

credit my-hiend.com

Musiland MD30 DAC/Headphone amp

China's Musiland has gained quite a following especially in the headphone enthusiast circles.  Its MD10 is considered one of the best in terms of price/performance ratio.  Its new DAC/Headphone amp, the MD30 features USB2.0 high speed asynchronous interface at up to 32bit/192kHz.  At its core, a FPGA audio processing technology promise lower jitter and more accurate sound.  Also new is an asynchronous high-speed cache and DDS re-clocking scheme via is 1ps high precision programmable clock.  Its headphone section features "Energy Headphone Amp Level-III" technology provides a comprehensive headphone drive capability than competitors. 

Specifications

1. Digital input:

• USB 2.0 High Speed ​​Interface: 16, 24, 32Bit sampling depth up to 192kHz 
• Coaxial RCA, BNC coaxial, fiber optic, AES: 16, 24Bit sampling depth up to 192kHz. Support MMDI instruction
• MULINK high-definition digital interface (proprietary i2s): 16, 24, 32Bit sampling depth up to 192kHz. Support MMDI instruction.
• Clock jitter (44.1kHz): S/PDIF less than 30PS, USB, MULINK less than 20PS

2. Line output

• XLR balanced and RCA unbalanced
• Dynamic range: greater than 120dB
• SNR (A weighted): greater than 120dB
• Total harmonic distortion: less than 0.0005%
• Frequency Response (20Hz ~ 20KHz): +-0.2dB
• Max Level: RCA Line 2V rms; XLR line 6V rms
• Output Impedance: 10KΩ

3. Headphone output

• Max Level: 4V rms
• Impedance: 10Ω
• Power: 260mW/RL = 300Ω

Schitt Audio Valhalla

Not really a digital product, but if headphone amps are what you are looking for - a company with really funny name - Schitt Audio's Valhalla is quite serious looking and interesting.  It is a Class A, single-ended triode headphone amplifier with no overall feedback and noninverting circuit topology. It provides classic tube sound and can drive headphones with impedances as low as 32 ohms. 

"Yes, we know that all you got out of the preceding paragraph is probably, "Classic tube sound." And if you're not a tube junkie, you might not even know what that means. Well, let us explain. Tube sound is a smoky nightclub with a hot chick in a red dress, it's a warm swimming pool in summer, glowing green against the purple twilight, it's a... well, hell, you can't really explain tube sound. Think "smooth, fluid , liquid, alive. "But not in a SF-movie-gonna-eat-you kinda way. Valhalla delivers warm, magical sound for most headphones, as long as they aren't less than 32 ohms."

Specifications

• Headphone Impedance: 32-600 ohms 
• Frequency Response: 10Hz-200KHz,-3dB 
• Maximum Output: 30V PP into 600 ohms 
• THD: Less than 0.1%, 20Hz-20KHz, at 1V 
• Topology: Class-A single-ended triode, zero feedback, noninverting, single voltage gain stage 
• Tube Complement: 6N1P dual triode input, 6N6P dual triode output, 1 each per channel 
• Power Consumption: 40W 
• Size: 9 x 6.75 x 3.25 " 
• Weight: 7 lbs
• $349