The challenge when using a condenser microphone with a preamp pedal, direct box or stage amp is that most of these only have unbalanced inputs. And as most phantom power supplies are only equipped with balanced inputs and outputs, making a proper connection is often difficult or impossible due to the impedance and level mismatch. 

The SB-48UB is a single channel phantom power generator that converts the power from a 15VDC supply to 48 Volts for use with a condenser microphone or active direct box. Inside, the SB48-UB converts the signal to both a lo-Z balanced XLR output and a hi-Z unbalanced ¼" out. Both outputs may be used concurrently whereby the XLR could feed the PA while the ¼" out could feed a stage amp or pedalboard

The K6 powering module is the heart of this Sennheiser professional modular
microphone system and can be powered either by its internal 'AA' size 1.5 V
battery or by 12 - 48 V phantom power. The K6 can be combined with different
condenser microphone heads to provide a wide variety of polar patterns. Matt
black, anodised scratch-resistant finish.
Profile
Powering module for battery/phantom powering with switchable roll-off filter, battery
on/off switch with battery test. Suitable for ME 62 - ME 67 microphone heads and
-60 versions of MKE microphones.Transmission factor 0 dB at 1 kHz, nominal
impedance 200 Ohm, min. terminating impedance 1 kOhm, max. output voltage 2 V
(at 1 kHz), power supply: phantom powering 12 - 48 V or 1.5 V (AA size)alkaline
battery, supply current 2.2 mA, battery life approx. 150 h, dimensions in mm:
? 22 x 155, resultant length 94 mm, weight approx. 45 g.

Features
Switchable bass roll-off filter protects against rumble, handling, pop and wind noise
On/off switch with battery test
High output, low noise
Transformerless balanced output on 3-pin XLR connector
Delivery Includes
1 K6 powering module
1 MZQ 200 microphone clamp
1 AA battery
1 protective carrying case

Technical Data
Nominal impedance  200 Ohm 
Min. terminating impedance  1000 Ohm 
Output voltage  2 V 
Power supply  Phantom 12 - 48 V 1x Typ IEC LR 06 
Current consumption  2,2 mA 
Operating time (Battery)  max. 150 h 
Dimensions  d 22 x 94 mm (netto) 
Weight  ca. 45 g 
Gain  0 dB 

The AKG MPA V L Phantom power adapter with XLR connector for L type MicroMic microphones with integrated bass roll-off switch. This product replaces the AKG MPA III L Phantom Power Adapter, which did not have a bass roll-off switch.

Alctron PS200 Portable 48V Phantom Power Supply for Condenser Microphone Live Broadcast Mic Power Supply